CVE-2026-2291
Fixed in a distro release EPSS <1%CVSS 7.3
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Products: dnsmasq
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | dnsmasq | 2.90-7.el10_2 |
| AlmaLinux 10 | dnsmasq-utils | 2.90-7.el10_2 |
| AlmaLinux 8 | dnsmasq | 2.79-36.el8_10 |
| AlmaLinux 8 | dnsmasq-utils | 2.79-36.el8_10 |
| AlmaLinux 9 | dnsmasq | 2.85-18.el9_8.1 |
| AlmaLinux 9 | dnsmasq-utils | 2.85-18.el9_8.1 |
| Alpine 3.22 | dnsmasq | 2.91-r1 |
| Alpine 3.23 | dnsmasq | 2.91-r1 |
| Alpine 3.24 | dnsmasq | 2.92_p2-r0 |
| Amazon Linux 2023 | dnsmasq | 2.90-1.amzn2023.0.2 |
| Amazon Linux 2023 | dnsmasq-utils | 2.90-1.amzn2023.0.2 |
| Chainguard | dnsmasq | 2.93-r0 |
| Chainguard | dnsmasq-doc | 2.93-r0 |
| Debian 12 | dnsmasq | 2.90-4~deb12u2 |
| Debian 13 | dnsmasq | 2.91-1+deb13u1 |
| Debian 14 | dnsmasq | 2.92-5 |
| Red Hat Enterprise Linux 10.2 | dnsmasq | 0:2.90-7.el10_2 |
| Red Hat Enterprise Linux 10.2 | dnsmasq-debuginfo | 0:2.90-7.el10_2 |
| Red Hat Enterprise Linux 10.2 | dnsmasq-debugsource | 0:2.90-7.el10_2 |
| Red Hat Enterprise Linux 10.2 | dnsmasq-utils | 0:2.90-7.el10_2 |
| Red Hat Enterprise Linux 10.2 | dnsmasq-utils-debuginfo | 0:2.90-7.el10_2 |
| Red Hat Enterprise Linux 8 | dnsmasq | 0:2.79-36.el8_10 |
| Red Hat Enterprise Linux 8 | dnsmasq-debuginfo | 0:2.79-36.el8_10 |
| Red Hat Enterprise Linux 8 | dnsmasq-debugsource | 0:2.79-36.el8_10 |
| Red Hat Enterprise Linux 8 | dnsmasq-utils | 0:2.79-36.el8_10 |
| Red Hat Enterprise Linux 8 | dnsmasq-utils-debuginfo | 0:2.79-36.el8_10 |
| Red Hat Enterprise Linux 9 | dnsmasq | 0:2.85-18.el9_8.1 |
| Red Hat Enterprise Linux 9 | dnsmasq-debuginfo | 0:2.85-18.el9_8.1 |
| Red Hat Enterprise Linux 9 | dnsmasq-debugsource | 0:2.85-18.el9_8.1 |
| Red Hat Enterprise Linux 9 | dnsmasq-utils | 0:2.85-18.el9_8.1 |
| Red Hat Enterprise Linux 9 | dnsmasq-utils-debuginfo | 0:2.85-18.el9_8.1 |
| Red Hat rhel eus 9.6 | dnsmasq | 0:2.85-17.el9_6.1 |
| Red Hat rhel eus 9.6 | dnsmasq-debuginfo | 0:2.85-17.el9_6.1 |
| Red Hat rhel eus 9.6 | dnsmasq-debugsource | 0:2.85-17.el9_6.1 |
| Red Hat rhel eus 9.6 | dnsmasq-utils | 0:2.85-17.el9_6.1 |
| Red Hat rhel eus 9.6 | dnsmasq-utils-debuginfo | 0:2.85-17.el9_6.1 |
| Rocky Linux 10 | dnsmasq | 0:2.90-7.el10_2 |
| Rocky Linux 8 | dnsmasq | 0:2.79-36.el8_10 |
| Rocky Linux 9 | dnsmasq | 0:2.85-18.el9_8.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | dnsmasq | 2.92rel2-18.27.1 |
| SUSE Linux Enterprise Server 16.0 | dnsmasq | 2.93-160000.1.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | dnsmasq | 2.92rel2-18.27.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | dnsmasq | 2.93-160000.1.1 |
| SUSE Linux Micro 6.1 | dnsmasq | 2.93-slfo.1.1_1.1 |
| Ubuntu 22.04 LTS | dnsmasq | 2.90-0ubuntu0.22.04.3 |
| Ubuntu 24.04 LTS | dnsmasq | 2.90-2ubuntu0.3 |
| Ubuntu 25.10 | dnsmasq | 2.91-1ubuntu0.2 |
| Ubuntu 26.04 LTS | dnsmasq | 2.92-1ubuntu0.2 |
| Ubuntu Pro 14.04 LTS | dnsmasq | 2.68-1ubuntu0.2+esm5 |
| Ubuntu Pro 16.04 LTS | dnsmasq | 2.90-0ubuntu0.16.04.1+esm3 |
| Ubuntu Pro 18.04 LTS | dnsmasq | 2.90-0ubuntu0.18.04.1+esm3 |
| Ubuntu Pro 20.04 LTS | dnsmasq | 2.90-0ubuntu0.20.04.1+esm2 |
| Wolfi | dnsmasq | 2.93-r0 |
| Wolfi | dnsmasq-doc | 2.93-r0 |
| openSUSE Leap 16.0 | dnsmasq | 2.93-160000.1.1 |
| openSUSE Tumbleweed | dnsmasq | 2.92rel2-1.1 |