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18 vulnerabilities by dnsmasq
CVE-2026-5172 (GCVE-0-2026-5172)
Vulnerability from nvd – Published: 2026-05-11 16:48 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-5172
Summary
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
Severity
7.3 (High)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:47 UTC
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-5172 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458521 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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CVE-2026-4893 (GCVE-0-2026-4893)
Vulnerability from nvd – Published: 2026-05-11 16:48 – Updated: 2026-05-20 14:09
VLAI
EPSS
VEX
Title
CVE-2026-4893
Summary
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
Impacted products
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CVE-2026-4892 (GCVE-0-2026-4892)
Vulnerability from nvd – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4892
Summary
A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
Severity
8.4 (High)
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:26 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4892 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458518 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4891 (GCVE-0-2026-4891)
Vulnerability from nvd – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4891
Summary
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Severity
5.3 (Medium)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:27 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4891 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458517 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4890 (GCVE-0-2026-4890)
Vulnerability from nvd – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:05
VLAI
EPSS
VEX
Title
CVE-2026-4890
Summary
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4890 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458516 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
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CVE-2026-2291 (GCVE-0-2026-2291)
Vulnerability from nvd – Published: 2026-05-11 16:47 – Updated: 2026-07-20 20:30
VLAI
EPSS
VEX
Title
CVE-2026-2291
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:38 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
8 references
Impacted products
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CVE-2020-37127 (GCVE-0-2020-37127)
Vulnerability from nvd – Published: 2026-02-05 16:13 – Updated: 2026-02-05 21:18
VLAI
EPSS
VEX
Title
dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service
Summary
Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-05 21:17 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/48301 | exploit |
| https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1 | product |
| https://www.vulncheck.com/advisories/dnsmasq-util… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq-utils |
Affected:
2.79
|
Date Public
2020-04-06 00:00
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CVE-2006-2017 (GCVE-0-2006-2017)
Vulnerability from nvd – Published: 2006-04-25 10:00 – Updated: 2024-08-07 17:35
VLAI
EPSS
VEX
Summary
Dnsmasq 2.29 allows remote attackers to cause a denial of service (application crash) via a DHCP client broadcast reply request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
6 references
| URL | Tags |
|---|---|
| http://secunia.com/advisories/19760 | third-party-advisoryx_refsource_SECUNIA |
| http://www.vupen.com/english/advisories/2006/1494 | vdb-entryx_refsource_VUPEN |
| http://www.osvdb.org/24884 | vdb-entryx_refsource_OSVDB |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.securityfocus.com/bid/17662 | vdb-entryx_refsource_BID |
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CVE-2005-0876 (GCVE-0-2005-0876)
Vulnerability from nvd – Published: 2005-03-26 05:00 – Updated: 2024-08-07 21:28
VLAI
EPSS
VEX
Summary
Off-by-one buffer overflow in Dnsmasq before 2.21 may allow attackers to execute arbitrary code via the DHCP lease file.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://secunia.com/advisories/14691 | third-party-advisoryx_refsource_SECUNIA |
| http://www.thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/12897 | vdb-entryx_refsource_BID |
Date Public
2005-03-25 00:00
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CVE-2026-5172 (GCVE-0-2026-5172)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-5172
Summary
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
Severity
7.3 (High)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:47 UTC
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-5172 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458521 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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CVE-2026-4893 (GCVE-0-2026-4893)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:48 – Updated: 2026-05-20 14:09
VLAI
EPSS
VEX
Title
CVE-2026-4893
Summary
An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
Impacted products
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CVE-2026-4892 (GCVE-0-2026-4892)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4892
Summary
A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.
Severity
8.4 (High)
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:26 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4892 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458518 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4891 (GCVE-0-2026-4891)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
Title
CVE-2026-4891
Summary
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Severity
5.3 (Medium)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:27 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://www.kb.cert.org/vuls/id/471747 | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4891 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458517 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-4890 (GCVE-0-2026-4890)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-09-01 12:05
VLAI
EPSS
VEX
Title
CVE-2026-4890
Summary
A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 18:28 UTC
CWE
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://www.kb.cert.org/vuls/id/471747 | |
| https://lists.thekelleys.org.uk/pipermail/dnsmasq… | |
| https://thekelleys.org.uk/dnsmasq/CVE/ | |
| https://github.com/NixOS/nixpkgs/pull/519093 | |
| https://github.com/NixOS/nixpkgs/pull/519082 | |
| https://github.com/pi-hole/FTL/releases/tag/v6.6.2 | |
| https://access.redhat.com/security/cve/CVE-2026-4890 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2458516 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:40762 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19158 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:20589 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:34508 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19373 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq |
Affected:
0 , < 2.92rel2
(custom)
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:2.90-7.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:2.79-36.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.85-18.el9_8.1 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.85-17.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607151909-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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CVE-2026-2291 (GCVE-0-2026-2291)
Vulnerability from cvelistv5 – Published: 2026-05-11 16:47 – Updated: 2026-07-20 20:30
VLAI
EPSS
VEX
Title
CVE-2026-2291
Summary
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 12:38 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
8 references
Impacted products
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CVE-2020-37127 (GCVE-0-2020-37127)
Vulnerability from cvelistv5 – Published: 2026-02-05 16:13 – Updated: 2026-02-05 21:18
VLAI
EPSS
VEX
Title
dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service
Summary
Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-05 21:17 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/48301 | exploit |
| https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1 | product |
| https://www.vulncheck.com/advisories/dnsmasq-util… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| dnsmasq | dnsmasq-utils |
Affected:
2.79
|
Date Public
2020-04-06 00:00
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CVE-2006-2017 (GCVE-0-2006-2017)
Vulnerability from cvelistv5 – Published: 2006-04-25 10:00 – Updated: 2024-08-07 17:35
VLAI
EPSS
VEX
Summary
Dnsmasq 2.29 allows remote attackers to cause a denial of service (application crash) via a DHCP client broadcast reply request.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
6 references
| URL | Tags |
|---|---|
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| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.securityfocus.com/bid/17662 | vdb-entryx_refsource_BID |
| http://thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
Date Public
2006-04-24 00:00
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CVE-2005-0876 (GCVE-0-2005-0876)
Vulnerability from cvelistv5 – Published: 2005-03-26 05:00 – Updated: 2024-08-07 21:28
VLAI
EPSS
VEX
Summary
Off-by-one buffer overflow in Dnsmasq before 2.21 may allow attackers to execute arbitrary code via the DHCP lease file.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://secunia.com/advisories/14691 | third-party-advisoryx_refsource_SECUNIA |
| http://www.thekelleys.org.uk/dnsmasq/CHANGELOG | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/12897 | vdb-entryx_refsource_BID |
Date Public
2005-03-25 00:00
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"description": {
"description_data": [
{
"lang": "eng",
"value": "Off-by-one buffer overflow in Dnsmasq before 2.21 may allow attackers to execute arbitrary code via the DHCP lease file."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
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}
]
},
"references": {
"reference_data": [
{
"name": "dnsmasq-dhcp-offbyone-bo(19825)",
"refsource": "XF",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/19825"
},
{
"name": "14691",
"refsource": "SECUNIA",
"url": "http://secunia.com/advisories/14691"
},
{
"name": "http://www.thekelleys.org.uk/dnsmasq/CHANGELOG",
"refsource": "CONFIRM",
"url": "http://www.thekelleys.org.uk/dnsmasq/CHANGELOG"
},
{
"name": "12897",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/12897"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2005-0876",
"datePublished": "2005-03-26T05:00:00.000Z",
"dateReserved": "2005-03-26T00:00:00.000Z",
"dateUpdated": "2024-08-07T21:28:28.694Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}