CVEvulnerability
CVE-2026-4891
5.3 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-05-11
- Last modified
- 2026-08-25
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-125
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.
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://github.com/NixOS/nixpkgs/pull/519082 github.com
- https://github.com/NixOS/nixpkgs/pull/519093 github.com
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2 github.com
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html lists.thekelleys.org.uk
- https://thekelleys.org.uk/dnsmasq/CVE/ thekelleys.org.uk
- https://www.kb.cert.org/vuls/id/471747 www.kb.cert.org
- https://access.redhat.com/errata/RHSA-2026:19158 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:19373 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:20589 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:34508 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:40762 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-4891 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2458517 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4891.json security.access.redhat.com