CVEvulnerability
CVE-2026-12969
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-06-23
- Last modified
- 2026-08-31
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-125
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.
Affected configurations
• redhat enterprise linux 10.0
• thekelleys dnsmasq (< 2.93)
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://access.redhat.com/security/cve/CVE-2026-12969 Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2491663 Issue Tracking, Vendor Advisory