CVE-2026-12969
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
71/100
Published: 2026-06-23
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
Low
I:
None
A:
None
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 (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| redhat | enterprise_linux | 10.0 |
| thekelleys | dnsmasq | < 2.93 |
References & Advisories (2)
Mitigation
Vendor Advisory
Issue Tracking
Vendor Advisory