CVE-2026-13002
Fixed in a distro release EPSS <1%CVSS 4.4
A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.
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 |
|---|---|---|
| Amazon Linux 2023 | dnsmasq | 2.90-1.amzn2023.0.3 |
| Amazon Linux 2023 | dnsmasq-utils | 2.90-1.amzn2023.0.3 |
| Debian 12 | dnsmasq | no fix |
| Debian 13 | dnsmasq | no fix |
| Debian 14 | dnsmasq | no fix |
| Ubuntu 22.04 LTS | dnsmasq | no fix |
| Ubuntu 24.04 LTS | dnsmasq | no fix |
| Ubuntu 26.04 LTS | dnsmasq | no fix |
| Ubuntu 26.10 | dnsmasq | no fix |
| Ubuntu Pro 14.04 LTS | dnsmasq | no fix |
| Ubuntu Pro 16.04 LTS | dnsmasq | no fix |
| Ubuntu Pro 18.04 LTS | dnsmasq | no fix |
| Ubuntu Pro 20.04 LTS | dnsmasq | no fix |