CVE-2026-5172: exploitation status and patch state

CVE-2026-5172 · patch available

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.

Is CVE-2026-5172 exploited?

• Not in the CISA KEV catalog.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

• CBL-Mariner Releases

What PlainSec published about CVE-2026-5172

• dnsmasq Flaws Span DNS Poisoning and Local Root (2026-05-13)

Primary sources

• NVD record

What this record does not say

• No CVSS score from NVD.
• No EPSS score.
• No affected package data.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.