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CVE-2026-74225 (GCVE-0-2026-74225)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 19:17

Title

U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6

Summary

U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

7.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 19:16 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/20209a62b…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-06 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74222 (GCVE-0-2026-74222)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-10-02 12:30

Title

U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback

Summary

U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-02 12:30 UTC

CWE

CWE-416 - Use After Free

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/2d94618a5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-09-01 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74221 (GCVE-0-2026-74221)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 13:47

Title

U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK

Summary

U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 13:47 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/1c0aff3a5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-19 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74220 (GCVE-0-2026-74220)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:04

Title

U-Boot before 2026.10-rc5 Buffer Overflow via NFS READ Reply

Summary

U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:04 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/0bbf09859…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-19 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71974 (GCVE-0-2026-71974)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 19:23

Title

U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read

Summary

U-Boot before 2026.10-rc3 contains an out-of-bounds write vulnerability in read_slotted_partition() that fails to validate image size against partition bounds. Attackers with physical access can supply crafted boot media with oversized headers to write past the load buffer into bootloader memory on devices without Android Verified Boot protection.

Severity

4.3 (Medium)


                        
                          CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

4.8 (Medium)


                        
                          CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 19:22 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

5 references

URL	Tags
https://github.com/u-boot/u-boot/commit/35432ef6f…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/bo…	technical-description
https://patch.msgid.link/20260729-b4-android-boot…	mailing-list
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-29 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71973 (GCVE-0-2026-71973)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-10-02 12:29

Title

U-Boot before 2026.10-rc4 Integer Overflow in SquashFS Directory Table Allocation

Summary

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.

Severity

5.2 (Medium)


                        
                          CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

5.2 (Medium)


                        
                          CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-02 12:29 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/561ae28cb…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/fs…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc4 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-28 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71972 (GCVE-0-2026-71972)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:10

Title

U-Boot through 2026.10-rc5 Out-of-Bounds Write in BMP RLE8 Decoder

Summary

U-Boot through 2026.10-rc5 contains an out-of-bounds write vulnerability in the video_display_rle8_bitmap function in drivers/video/video_bmp.c. Attackers can supply a crafted RLE8-compressed BMP image to corrupt memory adjacent to the framebuffer and crash the bootloader.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

5.9 (Medium)


                        
                          CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:10 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/5201e8334…	patch
https://github.com/u-boot/u-boot/blob/v2026.10-rc…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-throu…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-29 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71971 (GCVE-0-2026-71971)

Vulnerability from nvd – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:03

Title

U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly

Summary

U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:03 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/04ca915d5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-28 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-29009 (GCVE-0-2026-29009)

Vulnerability from nvd – Published: 2026-07-08 16:16 – Updated: 2026-07-24 17:32 X_Open Source

Title

U-Boot < 2026.07-rc2 Buffer Overflow in nfs_readlink_reply() via NFS READLINK

Summary

U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) when CONFIG_CMD_NFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfs_path_buff buffer by returning multiple relative symlink targets that are appended without cumulative length validation. Attackers can send two or more READLINK responses containing relative symlink targets of approximately 1100 bytes each to corrupt adjacent BSS variables including nfs_server_ip, nfs_server_mount_port, nfs_server_port, nfs_our_port, nfs_state, and rpc_id, potentially achieving memory corruption and control over the NFS client state machine.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 16:36 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

VulnCheck mitre root Scorecard

References

6 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://git.u-boot-project.org/u-boot/u-boot/-/re…	release-notes
https://git.u-boot-project.org/u-boot/u-boot/-/co…	patch
https://u-boot.org/
https://www.vulncheck.com/advisories/u-boot-rc3-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.07-rc2 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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CVE-2026-29008 (GCVE-0-2026-29008)

Vulnerability from nvd – Published: 2026-07-08 16:14 – Updated: 2026-07-14 18:39 X_Open Source

Title

U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()

Summary

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcp_rx_state_machine() function (net/tcp.c) that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payload_len to become negative. When the TCP_SYN_SENT handler calls tcp_rx_user_data() without invoking tcp_seg_in_wnd() validation, the negative payload_len is implicitly converted to a large unsigned integer (e.g., 0xFFFFFFD8) and passed to memcpy() in store_block(), causing an immediate crash that prevents device boot and may enable memory corruption when CONFIG_LMB is disabled.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:55 UTC

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://u-boot.org/	product
https://www.vulncheck.com/advisories/u-boot-rc3-i…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.04-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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CVE-2026-29007 (GCVE-0-2026-29007)

Vulnerability from nvd – Published: 2026-07-08 16:11 – Updated: 2026-07-14 18:39 X_Open Source

Title

U-Boot 2026.04-rc3 Out-of-Bounds Read in tcp_rx_state_machine via tcp.c

Summary

U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) when CONFIG_PROT_TCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field. Attackers can send a packet with an IP total length of 40 bytes and a TCP data offset claiming 60 bytes of header to cause tcp_parse_options() to read 40 bytes past the end of the TCP segment, potentially corrupting connection state variables such as rmt_win_scale and rmt_timestamp to disrupt TCP window calculations.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 19:43 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://u-boot.org/	product
https://www.vulncheck.com/advisories/u-boot-rc3-o…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.04-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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CVE-2026-74225 (GCVE-0-2026-74225)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 19:17

Title

U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6

Summary

U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

7.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 19:16 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/20209a62b…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-06 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74222 (GCVE-0-2026-74222)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-10-02 12:30

Title

U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback

Summary

U-Boot before 2026.10-rc5 contains a use-after-free vulnerability in the httpc_recv_cb() function within the lwIP wget implementation. When HTTP data storage fails, the callback frees the connection PCB but returns ERR_BUF instead of ERR_ABRT, causing the TCP input path to access released memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-02 12:30 UTC

CWE

CWE-416 - Use After Free

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/2d94618a5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-09-01 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74221 (GCVE-0-2026-74221)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 13:47

Title

U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK

Summary

U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 13:47 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/1c0aff3a5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-19 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-74220 (GCVE-0-2026-74220)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:04

Title

U-Boot before 2026.10-rc5 Buffer Overflow via NFS READ Reply

Summary

U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:04 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/0bbf09859…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-08-19 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71974 (GCVE-0-2026-71974)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 19:23

Title

U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read

Summary

U-Boot before 2026.10-rc3 contains an out-of-bounds write vulnerability in read_slotted_partition() that fails to validate image size against partition bounds. Attackers with physical access can supply crafted boot media with oversized headers to write past the load buffer into bootloader memory on devices without Android Verified Boot protection.

Severity

4.3 (Medium)


                        
                          CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

4.8 (Medium)


                        
                          CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 19:22 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

5 references

URL	Tags
https://github.com/u-boot/u-boot/commit/35432ef6f…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/bo…	technical-description
https://patch.msgid.link/20260729-b4-android-boot…	mailing-list
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-29 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71973 (GCVE-0-2026-71973)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-10-02 12:29

Title

U-Boot before 2026.10-rc4 Integer Overflow in SquashFS Directory Table Allocation

Summary

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.

Severity

5.2 (Medium)


                        
                          CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

5.2 (Medium)


                        
                          CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-02 12:29 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/561ae28cb…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/fs…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc4 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-28 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71972 (GCVE-0-2026-71972)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:10

Title

U-Boot through 2026.10-rc5 Out-of-Bounds Write in BMP RLE8 Decoder

Summary

U-Boot through 2026.10-rc5 contains an out-of-bounds write vulnerability in the video_display_rle8_bitmap function in drivers/video/video_bmp.c. Attackers can supply a crafted RLE8-compressed BMP image to corrupt memory adjacent to the framebuffer and crash the bootloader.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

5.9 (Medium)


                        
                          CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:10 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/5201e8334…	patch
https://github.com/u-boot/u-boot/blob/v2026.10-rc…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-throu…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.10-rc5 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-29 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-71971 (GCVE-0-2026-71971)

Vulnerability from cvelistv5 – Published: 2026-09-29 21:29 – Updated: 2026-09-30 14:03

Title

U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly

Summary

U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:03 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://github.com/u-boot/u-boot/commit/04ca915d5…	patch
https://github.com/u-boot/u-boot/blob/v2026.07/ne…	technical-description
https://github.com/u-boot/u-boot	product
https://www.vulncheck.com/advisories/u-boot-befor…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.10-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-07-28 00:00

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)

Show details on NVD website

JSON

To clipboard

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CVE-2026-29009 (GCVE-0-2026-29009)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:16 – Updated: 2026-07-24 17:32 X_Open Source

Title

U-Boot < 2026.07-rc2 Buffer Overflow in nfs_readlink_reply() via NFS READLINK

Summary

U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) when CONFIG_CMD_NFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfs_path_buff buffer by returning multiple relative symlink targets that are appended without cumulative length validation. Attackers can send two or more READLINK responses containing relative symlink targets of approximately 1100 bytes each to corrupt adjacent BSS variables including nfs_server_ip, nfs_server_mount_port, nfs_server_port, nfs_our_port, nfs_state, and rpc_id, potentially achieving memory corruption and control over the NFS client state machine.

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 16:36 UTC

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

VulnCheck mitre root Scorecard

References

6 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://git.u-boot-project.org/u-boot/u-boot/-/re…	release-notes
https://git.u-boot-project.org/u-boot/u-boot/-/co…	patch
https://u-boot.org/
https://www.vulncheck.com/advisories/u-boot-rc3-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , < 2026.07-rc2 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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CVE-2026-29008 (GCVE-0-2026-29008)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:14 – Updated: 2026-07-14 18:39 X_Open Source

Title

U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()

Summary

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcp_rx_state_machine() function (net/tcp.c) that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payload_len to become negative. When the TCP_SYN_SENT handler calls tcp_rx_user_data() without invoking tcp_seg_in_wnd() validation, the negative payload_len is implicitly converted to a large unsigned integer (e.g., 0xFFFFFFD8) and passed to memcpy() in store_block(), causing an immediate crash that prevents device boot and may enable memory corruption when CONFIG_LMB is disabled.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-09 13:55 UTC

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://u-boot.org/	product
https://www.vulncheck.com/advisories/u-boot-rc3-i…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.04-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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CVE-2026-29007 (GCVE-0-2026-29007)

Vulnerability from cvelistv5 – Published: 2026-07-08 16:11 – Updated: 2026-07-14 18:39 X_Open Source

Title

U-Boot 2026.04-rc3 Out-of-Bounds Read in tcp_rx_state_machine via tcp.c

Summary

U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) when CONFIG_PROT_TCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field. Attackers can send a packet with an IP total length of 40 bytes and a TCP data offset claiming 60 bytes of header to cause tcp_parse_options() to read 40 bytes past the end of the TCP segment, potentially corrupting connection state variables such as rmt_win_scale and rmt_timestamp to disrupt TCP window calculations.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-08 19:43 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck mitre root Scorecard

References

4 references

URL	Tags
https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/	technical-descriptionexploit
https://lists.denx.de/pipermail/u-boot/2026-May/6…	issue-tracking
https://u-boot.org/	product
https://www.vulncheck.com/advisories/u-boot-rc3-o…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
u-boot	u-boot	Affected: 0 , ≤ 2026.04-rc3 (custom) cpe:2.3:a:denx:u-boot::::::::

Date Public

2026-05-08 00:00

Credits

Kazuma Matsumoto, a security researcher at GMO Cybersecurity by IERAE, Inc. VulnCheck

Show details on NVD website

JSON

To clipboard

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