CVE-2026-5172

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Affected products

Linuxmint, Ubuntu, Dnsmasq

CVSS 3.1

7.5 HIGH

EPSS

2.7% (85th percentile)

Weakness

CWE-125

NVD status

Awaiting Analysis

Published

2026-05-11