CVE-2026-4890

Published: May 11, 2026Modified: Jul 23, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of service via a crafted DNS packet.

Related CWEs

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

References (14)

https://github.com/NixOS/nixpkgs/pull/519082

Source: cret@cert.org

https://github.com/NixOS/nixpkgs/pull/519093

Source: cret@cert.org

https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Source: cret@cert.org

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html

Source: cret@cert.org

https://thekelleys.org.uk/dnsmasq/CVE/

Source: cret@cert.org

https://www.kb.cert.org/vuls/id/471747

Source: cret@cert.org

https://access.redhat.com/errata/RHSA-2026:19158