High7.5Red Hat Linux

High [CVE-2026-5172] extract_addresses() OOB read via malformed rdlen

This high-severity Red Hat Linux advisory covers CVE-2026-5172 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

CVE-2026-5172 Published May 9, 2026

CVE-2026-5172

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

extract_addresses() OOB read via malformed rdlen. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-125. Affected package(s): dnsmasq.

Resolved in Red Hat advisory RHSA-2026:19158 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.

Affected versions

dnsmasq-0:2.90-7.el10_2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:19158

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:19158 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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