Common Weakness Enumeration

CWE-476

Allowed

NULL Pointer Dereference

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product dereferences a pointer that it expects to be valid but is NULL.

6769 vulnerabilities reference this CWE, most recent first.

CVE-2022-21815 (GCVE-0-2022-21815)

Vulnerability from cvelistv5 – Published: 2022-02-07 20:00 – Updated: 2024-08-03 02:53
VLAI
Summary
NVIDIA GPU Display Driver for Windows contains a vulnerability in the kernel mode layer (nvlddmkm.sys) handler for private IOCTLs where a NULL pointer dereference in the kernel, created within user mode code, may lead to a denial of service in the form of a system crash.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
NVIDIA NVIDIA GPU Display Driver Affected: All GPU Driver versions for Windows
Create a notification for this product.
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CVE-2022-20746 (GCVE-0-2022-20746)

Vulnerability from cvelistv5 – Published: 2022-05-03 03:15 – Updated: 2024-11-06 16:21
VLAI
Title
Cisco Firepower Threat Defense Software TCP Proxy Denial of Service Vulnerability
Summary
A vulnerability in the TCP proxy functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper handling of TCP flows. An attacker could exploit this vulnerability by sending a crafted stream of TCP traffic through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-06 16:01 UTC
CWE
Assigner
References
URL Tags
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Date Public
2022-04-27 00:00
Show details on NVD website
To clipboard 

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CVE-2022-4981 (GCVE-0-2022-4981)

Vulnerability from cvelistv5 – Published: 2025-10-21 15:02 – Updated: 2025-10-21 15:22
VLAI
Title
DCMTK dcmqrscp dcmqrcnf.cc readPeerList null pointer dereference
Summary
A vulnerability was detected in DCMTK up to 3.6.7. The impacted element is the function DcmQueryRetrieveConfig::readPeerList of the file /dcmqrcnf.cc of the component dcmqrscp. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit is now public and may be used. Upgrading to version 3.6.8 is sufficient to resolve this issue. The patch is identified as 957fb31e5. Upgrading the affected component is advised.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-21 15:22 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a DCMTK Affected: 3.6.0
Affected: 3.6.1
Affected: 3.6.2
Affected: 3.6.3
Affected: 3.6.4
Affected: 3.6.5
Affected: 3.6.6
Affected: 3.6.7
Unaffected: 3.6.8
Credits
zh_vul (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2022-4843 (GCVE-0-2022-4843)

Vulnerability from cvelistv5 – Published: 2022-12-29 00:00 – Updated: 2025-04-09 15:47
VLAI
Title
NULL Pointer Dereference in radareorg/radare2
Summary
NULL Pointer Dereference in GitHub repository radareorg/radare2 prior to 5.8.2.
Severity
4.4 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-09 14:50 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
radareorg radareorg/radare2 Affected: unspecified , < 5.8.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2022-4842 (GCVE-0-2022-4842)

Vulnerability from cvelistv5 – Published: 2023-01-12 00:00 – Updated: 2025-04-08 13:45
VLAI
Summary
A flaw NULL Pointer Dereference in the Linux kernel NTFS3 driver function attr_punch_hole() was found. A local user could use this flaw to crash the system.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-08 13:44 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Kernel Affected: Linux kernel 6.2-rc1
Show details on NVD website
To clipboard 

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CVE-2022-4285 (GCVE-0-2022-4285)

Vulnerability from cvelistv5 – Published: 2023-01-27 00:00 – Updated: 2025-03-28 15:41
VLAI
Summary
An illegal memory access flaw was found in the binutils package. Parsing an ELF file containing corrupt symbol version information may result in a denial of service. This issue is the result of an incomplete fix for CVE-2020-16599.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-28 15:40 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a binutils Affected: binutils 2.39-7
Show details on NVD website
To clipboard 

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CVE-2022-4128 (GCVE-0-2022-4128)

Vulnerability from cvelistv5 – Published: 2022-11-28 00:00 – Updated: 2025-04-14 18:08
VLAI
Summary
A NULL pointer dereference issue was discovered in the Linux kernel in the MPTCP protocol when traversing the subflow list at disconnect time. A local user could use this flaw to potentially crash the system causing a denial of service.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-14 16:18 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Linux kernel (mptcp) Affected: Fixed in 5.19
Show details on NVD website
To clipboard 

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CVE-2022-4127 (GCVE-0-2022-4127)

Vulnerability from cvelistv5 – Published: 2022-11-28 00:00 – Updated: 2025-04-14 18:08
VLAI
Summary
A NULL pointer dereference issue was discovered in the Linux kernel in io_files_update_with_index_alloc. A local user could use this flaw to potentially crash the system causing a denial of service.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-14 16:26 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Linux kernel (io_uring) Affected: Fixed in 5.19
Show details on NVD website
To clipboard 

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CVE-2022-4121 (GCVE-0-2022-4121)

Vulnerability from cvelistv5 – Published: 2023-01-17 00:00 – Updated: 2025-11-03 19:27
VLAI
Summary
In libetpan a null pointer dereference in mailimap_mailbox_data_status_free in low-level/imap/mailimap_types.c was found that could lead to a remote denial of service or other potential consequences.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-04 17:59 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libetpan Affected: unknown
Show details on NVD website
To clipboard 

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CVE-2022-3341 (GCVE-0-2022-3341)

Vulnerability from cvelistv5 – Published: 2023-01-12 00:00 – Updated: 2025-04-08 15:56
VLAI
Summary
A null pointer dereference issue was discovered in 'FFmpeg' in decode_main_header() function of libavformat/nutdec.c file. The flaw occurs because the function lacks check of the return value of avformat_new_stream() and triggers the null pointer dereference error, causing an application to crash.
Severity
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 2025-04-08 15:56 UTC
CWE
  • CWE-476 - - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
n/a FFmpeg Affected: Fixed-in ffmpeg 5.1
Show details on NVD website
To clipboard 

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Mitigation MIT-56
Implementation

For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].

Mitigation
Requirements

Select a programming language that is not susceptible to these issues.

Mitigation
Implementation

Check the results of all functions that return a value and verify that the value is non-null before acting upon it.

Mitigation
Architecture and Design

Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.

Mitigation
Implementation

Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.

No CAPEC attack patterns related to this CWE.

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