CVE-2026-12969
Last modified
CVE-2026-12969 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.25% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Enterprise Linux | 10.0 |
| Thekelleys | Dnsmasq | < 2.93 |
References
- https://access.redhat.com/security/cve/CVE-2026-12969Vendor Advisory, Mitigation
- https://bugzilla.redhat.com/show_bug.cgi?id=2491663Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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