PT-2026-51520 · Red Hat · Red Hat Enterprise Linux 10+5

Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-12969

NVD

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

An out-of-bounds read vulnerability exists in dnsmasq's find soa() function in src/rfc1035.c. When parsing NS section records, extract name() is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can exploit this via a crafted NXDOMAIN response to cause a 10-byte heap out-of-bounds read, potentially accessing stale data from prior transactions.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-12969

Affected 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

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-12969 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-12969 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2491663 · Note