CVE-2026-2291

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.

Affected products

Linuxmint, Rocky Linux, Ubuntu, Dnsmasq

Fix

Available

CVSS 3.1

7.3 HIGH

EPSS

0.6% (47th percentile)

NVD status

Awaiting Analysis

Published

2026-05-11