CVE-2026-12969: Red Hat Enterprise Linux

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Red Hat Enterprise Linux: version 10.0 only
• Thekelleys Dnsmasq: before 2.93 (fixed in 2.93)

Published 2026-06-23. Last modified 2026-08-31.