VULNERABILITY INTELLIGENCE

CVE-2026-12969

CVSS score5.3 MEDIUM
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-06-23
Last modified2026-08-31
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Description

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.

Weakness classification

  • secalert@redhat.com: CWE-125

Primary references