Description
A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
dnsmasq dnsmasq
0 to < 2.92rel2affected
References
- https://www.kb.cert.org/vuls/id/471747 ↗
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html ↗
- https://thekelleys.org.uk/dnsmasq/CVE/ ↗
- https://github.com/NixOS/nixpkgs/pull/519082 ↗
- https://github.com/NixOS/nixpkgs/pull/519093 ↗
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2 ↗
- https://access.redhat.com/security/cve/CVE-2026-5172 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2458521 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5172.json ↗
- https://access.redhat.com/errata/RHSA-2026:19158 ↗