CVE-2026-12725
Fixed in a distro release EPSS <1%CVSS 5.9
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.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | dnsmasq | no fix |
| Debian 13 | dnsmasq | 2.91-1+deb13u2 |
| Debian 14 | dnsmasq | 2.93-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Micro 5.3 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Micro 5.4 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Micro 5.5 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | dnsmasq | 2.93-18.32.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server 16.0 | dnsmasq | 2.93-160000.1.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | dnsmasq | 2.93-18.32.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | dnsmasq | 2.93-150400.16.17.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dnsmasq | 2.93-160000.1.1 |
| SUSE Linux Micro 6.0 | dnsmasq | 2.93-1.1 |
| SUSE Linux Micro 6.1 | dnsmasq | 2.93-slfo.1.1_1.1 |
| Ubuntu 22.04 LTS | dnsmasq | 2.90-0ubuntu0.22.04.4 |
| Ubuntu 24.04 LTS | dnsmasq | 2.90-2ubuntu0.4 |
| Ubuntu 25.10 | dnsmasq | no fix |
| Ubuntu 26.04 LTS | dnsmasq | 2.92-1ubuntu0.4 |
| Ubuntu Pro 16.04 LTS | dnsmasq | 2.90-0ubuntu0.16.04.1+esm4 |
| Ubuntu Pro 18.04 LTS | dnsmasq | 2.90-0ubuntu0.18.04.1+esm4 |
| Ubuntu Pro 20.04 LTS | dnsmasq | 2.90-0ubuntu0.20.04.1+esm3 |
| openSUSE Leap 16.0 | dnsmasq | 2.93-160000.1.1 |
| openSUSE Tumbleweed | dnsmasq | 2.93-1.1 |