🛡️ OESA-2026-2965 — dnsmasq

🟡 CVSS 5.0 — Medium ✅ No Known Exploit OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

dnsmasq security update

Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used for tethering on smartphones and portable hotspots, and to support virtual networking in virtualisation frameworks.

Security Fix(es):

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.(CVE-2026-12725)

Affected software

OESA-2026-2965 is recorded against 1 package.

  • dnsmasq (fixed in 2.86-16.oe2203sp4)

Timeline and source

Published on 9 July 2026 and last revised on 14 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.openeuler.org (Advisory)
nvd.nist.gov (Advisory)

Details

Severity MEDIUM
CVSS Score 5.0
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-09
Updated 2026-08-12
Modified 2026-07-14
Fix URL N/A

Affected Packages

Software From version Fixed in
dnsmasq — 2.86-16.oe2203sp4

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