CVE catalog

CVE-2026-12969

An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 a

[CVE catalog]

Severity
Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Published
Source
[NVD] · [CVE record]
EPSS
0.26% · Oct 25, 2026

An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can exploit this via a crafted NXDOMAIN response to cause a 10-byte heap out-of-bounds read, potentially accessing stale data from prior transactions.

Vulnerable and fixed packages

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

DistributionPackageReleaseVersionStatus
Debiandnsmasqsid2.93-3fixed
Debiandnsmasqforky2.93-3fixed
Debiandnsmasqtrixie2.91-1+deb13u2fixed
Debiandnsmasqtrixie-security2.91-1+deb13u1vulnerable
Debiandnsmasqbookworm2.90-4~deb12u2vulnerable
Debiandnsmasqbookworm-security2.90-4~deb12u2vulnerable
CpednsmasqNot reportedNot reportedvulnerable
Cpeenterprise_linuxNot reportedNot reportedunknown
CpednsmasqNot reported2.93fixed
CpednsmasqNot reported2.90-2ubuntu0.4fixed
Cpednsmasq-baseNot reported2.90-2ubuntu0.4fixed
Cpednsmasq-base-luaNot reported2.90-2ubuntu0.4fixed
Cpednsmasq-utilsNot reported2.90-2ubuntu0.4fixed
Cpeenterprise_linuxNot reportedNot reportedunknown
CpednsmasqNot reported2.93fixed
Susednsmasqlinux micro 6.12.93-slfo.1.1_2.1fixed
Ubuntudnsmasqpro2.80-1ubuntu2vulnerable
Ubuntudnsmasqpro2.80-1ubuntu4vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.2vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.3vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.4vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.5vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.6vulnerable
Ubuntudnsmasqpro2.80-1.1ubuntu1.7vulnerable
Ubuntudnsmasqpro2.90-0ubuntu0.20.04.1vulnerable
Ubuntudnsmasqpro2.90-0ubuntu0.20.04.1+esm2vulnerable
Ubuntudnsmasqpro2.90-0ubuntu0.20.04.1+esm3fixed
Ubuntudnsmasq22.042.85-1ubuntu2vulnerable
Ubuntudnsmasq22.042.86-1.1vulnerable
Ubuntudnsmasq22.042.86-1.1ubuntu0.1vulnerable
Ubuntudnsmasq22.042.86-1.1ubuntu0.2vulnerable
Ubuntudnsmasq22.042.86-1.1ubuntu0.3vulnerable
Ubuntudnsmasq22.042.86-1.1ubuntu0.4vulnerable
Ubuntudnsmasq22.042.86-1.1ubuntu0.5vulnerable
Ubuntudnsmasq22.042.90-0ubuntu0.22.04.1vulnerable
Ubuntudnsmasq22.042.90-0ubuntu0.22.04.3vulnerable
Ubuntudnsmasq22.042.90-0ubuntu0.22.04.4fixed
Ubuntudnsmasq24.042.89-1vulnerable
Ubuntudnsmasq24.042.90-2vulnerable
Ubuntudnsmasq24.042.90-2build1vulnerable
Ubuntudnsmasq24.042.90-2build2vulnerable
Ubuntudnsmasq24.042.90-2ubuntu0.1vulnerable
Ubuntudnsmasq24.042.90-2ubuntu0.3vulnerable
Ubuntudnsmasq24.042.90-2ubuntu0.4fixed
Ubuntudnsmasq25.102.91-1vulnerable
Ubuntudnsmasq25.102.91-1build1vulnerable
Ubuntudnsmasq25.102.91-1ubuntu0.2vulnerable
Ubuntudnsmasq26.042.91-1build1vulnerable
Ubuntudnsmasq26.042.92~rc3-1vulnerable
Ubuntudnsmasq26.042.92-1vulnerable
Ubuntudnsmasq26.042.92-1ubuntu0.2vulnerable
Ubuntudnsmasq26.042.92-1ubuntu0.3vulnerable
Ubuntudnsmasq26.042.92-1ubuntu0.4fixed
Opensusednsmasqtumbleweed2.93-2.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debiandnsmasqsourcesid2.93-1not yet assignedNot reportedNot reported
Debiandnsmasqsourceforky2.93-1not yet assignedNot reportedNot reported
Debiandnsmasqsourcetrixie2.91-1+deb13u2not yet assignedNot reportedNot reported
Debiandnsmasqsourcebookworm(unfixed)not yet assignedNot reportedNot reported
CpednsmasqcpeNot reported2.93Not reportedNot reportedNot reported
CpednsmasqcpeNot reported2.90-2ubuntu0.4Not reportedNot reportedNot reported
Cpednsmasq-basecpeNot reported2.90-2ubuntu0.4Not reportedNot reportedNot reported
Cpednsmasq-base-luacpeNot reported2.90-2ubuntu0.4Not reportedNot reportedNot reported
Cpednsmasq-utilscpeNot reported2.90-2ubuntu0.4Not reportedNot reportedNot reported
CpednsmasqcpeNot reported2.93Not reportedNVD-CVE-2026-12969Not reported
Susednsmasqrpmlinux micro 6.12.93-slfo.1.1_2.1Not reportedSUSE-SU-2026:22668-1Not reported
Ubuntudnsmasqdebpro2.90-0ubuntu0.20.04.1+esm3Not reportedUBUNTU-CVE-2026-12969Not reported
Ubuntudnsmasqdeb22.042.90-0ubuntu0.22.04.4Not reportedUBUNTU-CVE-2026-12969Not reported
Ubuntudnsmasqdeb24.042.90-2ubuntu0.4Not reportedUBUNTU-CVE-2026-12969Not reported
Ubuntudnsmasqdeb26.042.92-1ubuntu0.4Not reportedUBUNTU-CVE-2026-12969Not reported
Opensusednsmasqrpmtumbleweed2.93-2.1Not reportedOPENSUSE-SU-2026:11172-1Not 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: 2.93-2.1

      Version impact unknown

      nvd · dnsmasq · opensuse · tumbleweed

  • [dnsmasq]Fixed

    Source package: [dnsmasq]

    Details (1)

    • 2.93-2.3 · x86_64 · tumbleweed

      Fixed · Fixed: 2.93-2.1

      nvd · dnsmasq · opensuse · tumbleweed

Observed:

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)]