CVE-2026-12969
mediumpriority · track · 0EPSS 0.003 · 17 %ileDEEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (6)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2042dnsmasq: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2026-06-23csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in dnsmasq ausnutzen, um Informationen offenzulegen.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/CVE-2026-12969cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2491663cnnvd
- https://access.redhat.com/security/cve/CVE-2026-12969enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2491663enisa_euvd
- https://access.redhat.com/security/cve/CVE-2026-12969MitigationVendor Advisorynvd
- https://bugzilla.redhat.com/show_bug.cgi?id=2491663Issue TrackingVendor Advisorynvd
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