Description
A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.
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://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html ↗
- https://www.kb.cert.org/vuls/id/471747 ↗
- 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-2026-4891 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2458517 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4891.json ↗
- https://access.redhat.com/errata/RHSA-2026:40762 ↗
- https://access.redhat.com/errata/RHSA-2026:19158 ↗
- https://access.redhat.com/errata/RHSA-2026:20589 ↗
- https://access.redhat.com/errata/RHSA-2026:34508 ↗
- https://access.redhat.com/errata/RHSA-2026:19373 ↗