An update for dnsmasq is now available for openEuler-22.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-2965 Final 1.0 1.0 2026-07-09 Initial 2026-07-09 2026-07-09 openEuler SA Tool V1.0 2026-07-09 dnsmasq security update An update for dnsmasq is now available for openEuler-22.03-LTS-SP4 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) An update for dnsmasq is now available for openEuler-22.03-LTS-SP4. openEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Medium dnsmasq https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2965 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-12725 https://nvd.nist.gov/vuln/detail/CVE-2026-12725 openEuler-22.03-LTS-SP4 dnsmasq-2.86-16.oe2203sp4.aarch64.rpm dnsmasq-debuginfo-2.86-16.oe2203sp4.aarch64.rpm dnsmasq-debugsource-2.86-16.oe2203sp4.aarch64.rpm dnsmasq-help-2.86-16.oe2203sp4.aarch64.rpm dnsmasq-2.86-16.oe2203sp4.src.rpm dnsmasq-2.86-16.oe2203sp4.x86_64.rpm dnsmasq-debuginfo-2.86-16.oe2203sp4.x86_64.rpm dnsmasq-debugsource-2.86-16.oe2203sp4.x86_64.rpm dnsmasq-help-2.86-16.oe2203sp4.x86_64.rpm 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. 2026-07-09 CVE-2026-12725 openEuler-22.03-LTS-SP4 Medium 5.9 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H dnsmasq security update 2026-07-09 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2965