CVE catalog

CVE-2026-12725

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Apr 21, 2026, 9:14:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.53% · Oct 25, 2026

A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS response may crash the dnsmasq process, resulting in denial of service.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	dnsmasq	sid	`2.93-3`	fixed
Debian	dnsmasq	forky	`2.93-3`	fixed
Debian	dnsmasq	trixie	`2.91-1+deb13u2`	fixed
Debian	dnsmasq	trixie-security	`2.91-1+deb13u1`	vulnerable
Debian	dnsmasq	bookworm	`2.90-4~deb12u2`	vulnerable
Debian	dnsmasq	bookworm-security	`2.90-4~deb12u2`	vulnerable
Cpe	dnsmasq	Not reported	Not reported	vulnerable
Cpe	openshift_container_platform	Not reported	Not reported	unknown
Cpe	enterprise_linux	Not reported	Not reported	unknown
Cpe	dnsmasq	Not reported	`2.93`	fixed
Cpe	dnsmasq	Not reported	`2.90-2ubuntu0.4`	fixed
Cpe	dnsmasq-base	Not reported	`2.90-2ubuntu0.4`	fixed
Cpe	dnsmasq-base-lua	Not reported	`2.90-2ubuntu0.4`	fixed
Cpe	dnsmasq-utils	Not reported	`2.90-2ubuntu0.4`	fixed
Cpe	openshift_container_platform	Not reported	Not reported	unknown
Cpe	enterprise_linux	Not reported	Not reported	unknown
Cpe	dnsmasq	Not reported	`2.93`	fixed
Suse	dnsmasq	linux micro 6.0	`2.93-1.1`	fixed
Suse	dnsmasq	linux enterprise micro 5.3	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise micro 5.4	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise micro 5.5	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise module for basesystem 15 sp7	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise high performance computing 15 sp4-espos	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise high performance computing 15 sp4-ltss	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise high performance computing 15 sp5-espos	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise high performance computing 15 sp5-ltss	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server 15 sp4-ltss	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server 15 sp5-ltss	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server 15 sp6-ltss	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server for sap applications 15 sp4	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server for sap applications 15 sp5	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server for sap applications 15 sp6	`2.93-150400.16.17.1`	fixed
Suse	dnsmasq	linux enterprise server 12 sp5-ltss	`2.93-18.32.1`	fixed
Suse	dnsmasq	linux enterprise server ltss extended security 12 sp5	`2.93-18.32.1`	fixed
Ubuntu	dnsmasq	pro	`2.80-1ubuntu2`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1ubuntu4`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.2`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.3`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.4`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.5`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.6`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.7`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1+esm2`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1+esm3`	fixed
Ubuntu	dnsmasq	22.04	`2.85-1ubuntu2`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.2`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.4`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.5`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.3`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.4`	fixed
Ubuntu	dnsmasq	24.04	`2.89-1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2build1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2build2`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.4`	fixed
Ubuntu	dnsmasq	26.04	`2.91-1build1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92~rc3-1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.2`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.4`	fixed
Ubuntu	dnsmasq	pro	`2.80-1ubuntu2`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1ubuntu4`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.2`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.3`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.4`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.5`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.6`	vulnerable
Ubuntu	dnsmasq	pro	`2.80-1.1ubuntu1.7`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1+esm2`	vulnerable
Ubuntu	dnsmasq	pro	`2.90-0ubuntu0.20.04.1+esm3`	fixed
Ubuntu	dnsmasq	22.04	`2.85-1ubuntu2`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.2`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.4`	vulnerable
Ubuntu	dnsmasq	22.04	`2.86-1.1ubuntu0.5`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.1`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.3`	vulnerable
Ubuntu	dnsmasq	22.04	`2.90-0ubuntu0.22.04.4`	fixed
Ubuntu	dnsmasq	24.04	`2.89-1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2build1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2build2`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.1`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	24.04	`2.90-2ubuntu0.4`	fixed
Ubuntu	dnsmasq	25.10	`2.91-1`	vulnerable
Ubuntu	dnsmasq	25.10	`2.91-1build1`	vulnerable
Ubuntu	dnsmasq	25.10	`2.91-1ubuntu0.2`	vulnerable
Ubuntu	dnsmasq	26.04	`2.91-1build1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92~rc3-1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.2`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.3`	vulnerable
Ubuntu	dnsmasq	26.04	`2.92-1ubuntu0.4`	fixed
Suse	dnsmasq	linux enterprise server 16.0	`2.93-160000.1.1`	fixed
Suse	dnsmasq	linux enterprise server for sap applications 16.0	`2.93-160000.1.1`	fixed
Suse	dnsmasq	linux micro 6.1	`2.93-slfo.1.1_1.1`	fixed
Opensuse	dnsmasq	leap 16.0	`2.93-160000.1.1`	fixed
Opensuse	dnsmasq	tumbleweed	`2.93-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	dnsmasq	source	sid	`2.93-1`	not yet assigned	Not reported	Not reported
Debian	dnsmasq	source	forky	`2.93-1`	not yet assigned	Not reported	Not reported
Debian	dnsmasq	source	trixie	`2.91-1+deb13u2`	not yet assigned	Not reported	Not reported
Debian	dnsmasq	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	dnsmasq	cpe	Not reported	`2.93`	Not reported	Not reported	Not reported
Cpe	dnsmasq	cpe	Not reported	`2.90-2ubuntu0.4`	Not reported	Not reported	Not reported
Cpe	dnsmasq-base	cpe	Not reported	`2.90-2ubuntu0.4`	Not reported	Not reported	Not reported
Cpe	dnsmasq-base-lua	cpe	Not reported	`2.90-2ubuntu0.4`	Not reported	Not reported	Not reported
Cpe	dnsmasq-utils	cpe	Not reported	`2.90-2ubuntu0.4`	Not reported	Not reported	Not reported
Cpe	dnsmasq	cpe	Not reported	`2.93`	Not reported	NVD-CVE-2026-12725	Not reported
Suse	dnsmasq	rpm	linux micro 6.0	`2.93-1.1`	Not reported	SUSE-SU-2026:22706-1	Not reported
Suse	dnsmasq	rpm	linux enterprise micro 5.3	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise micro 5.4	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise micro 5.5	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise module for basesystem 15 sp7	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise high performance computing 15 sp4-espos	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise high performance computing 15 sp4-ltss	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise high performance computing 15 sp5-espos	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise high performance computing 15 sp5-ltss	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server 15 sp4-ltss	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server 15 sp5-ltss	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server 15 sp6-ltss	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server for sap applications 15 sp4	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server for sap applications 15 sp5	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server for sap applications 15 sp6	`2.93-150400.16.17.1`	Not reported	SUSE-SU-2026:3028-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server 12 sp5-ltss	`2.93-18.32.1`	Not reported	SUSE-SU-2026:2974-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server ltss extended security 12 sp5	`2.93-18.32.1`	Not reported	SUSE-SU-2026:2974-1	Not reported
Ubuntu	dnsmasq	deb	pro	`2.90-0ubuntu0.20.04.1+esm3`	Not reported	USN-8542-1	Not reported
Ubuntu	dnsmasq	deb	22.04	`2.90-0ubuntu0.22.04.4`	Not reported	USN-8542-1	Not reported
Ubuntu	dnsmasq	deb	24.04	`2.90-2ubuntu0.4`	Not reported	USN-8542-1	Not reported
Ubuntu	dnsmasq	deb	26.04	`2.92-1ubuntu0.4`	Not reported	USN-8542-1	Not reported
Ubuntu	dnsmasq	deb	pro	`2.90-0ubuntu0.20.04.1+esm3`	Not reported	UBUNTU-CVE-2026-12725	Not reported
Ubuntu	dnsmasq	deb	22.04	`2.90-0ubuntu0.22.04.4`	Not reported	UBUNTU-CVE-2026-12725	Not reported
Ubuntu	dnsmasq	deb	24.04	`2.90-2ubuntu0.4`	Not reported	UBUNTU-CVE-2026-12725	Not reported
Ubuntu	dnsmasq	deb	26.04	`2.92-1ubuntu0.4`	Not reported	UBUNTU-CVE-2026-12725	Not reported
Suse	dnsmasq	rpm	linux enterprise server 16.0	`2.93-160000.1.1`	Not reported	SUSE-SU-2026:22496-1	Not reported
Suse	dnsmasq	rpm	linux enterprise server for sap applications 16.0	`2.93-160000.1.1`	Not reported	SUSE-SU-2026:22496-1	Not reported
Suse	dnsmasq	rpm	linux micro 6.1	`2.93-slfo.1.1_1.1`	Not reported	SUSE-SU-2026:22454-1	Not reported
Opensuse	dnsmasq	rpm	leap 16.0	`2.93-160000.1.1`	Not reported	OPENSUSE-SU-2026:21192-1	Not reported
Opensuse	dnsmasq	rpm	tumbleweed	`2.93-1.1`	Not reported	OPENSUSE-SU-2026:11116-1	Not reported

Notes

[bookworm] dnsmasq: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[dnsmasq]Affected
Details (4)
- 2.90-4~deb12u2 · all · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · all · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · all · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · all · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
[dnsmasq-base]Affected
Source package: [dnsmasq]
Details (4)
- 2.90-4~deb12u2 · amd64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · amd64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
[dnsmasq-base-lua]Affected
Source package: [dnsmasq]
Details (4)
- 2.90-4~deb12u2 · amd64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · amd64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
[dnsmasq-utils]Affected
Source package: [dnsmasq]
Details (4)
- 2.90-4~deb12u2 · amd64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · amd64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12
- 2.90-4~deb12u2 · arm64 · bookworm-security
  Affected
  nvd · dnsmasq · debian · bookworm; nvd · dnsmasq · debian · 12

[Debian 13 (Trixie)]

[dnsmasq]Affected
Details (4)
- 2.91-1+deb13u1 · all · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · all · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · all · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · all · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
[dnsmasq-base]Affected
Source package: [dnsmasq]
Details (4)
- 2.91-1+deb13u1 · amd64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · amd64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
[dnsmasq-base-lua]Affected
Source package: [dnsmasq]
Details (4)
- 2.91-1+deb13u1 · amd64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · amd64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
[dnsmasq-utils]Affected
Source package: [dnsmasq]
Details (4)
- 2.91-1+deb13u1 · amd64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · amd64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13
- 2.91-1+deb13u1 · arm64 · trixie-security
  Affected · Fixed: 2.91-1+deb13u2
  nvd · dnsmasq · debian · 13

[openSUSE Tumbleweed]

[dnsmasq-utils]Unknown
Source package: [dnsmasq]
Details (1)
- 2.93-2.3 · x86_64 · tumbleweed
  Unknown · Fixed: 2.93-1.1
  Version impact unknown
  nvd · dnsmasq · opensuse · tumbleweed
[dnsmasq]Fixed
Source package: [dnsmasq]
Details (1)
- 2.93-2.3 · x86_64 · tumbleweed
  Fixed · Fixed: 2.93-1.1
  nvd · dnsmasq · opensuse · tumbleweed

Observed: Oct 27, 2026, 7:58:38 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]