CVE-2026-4890

7.5 HIGH
Published: May 11, 2026 Modified: May 12, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
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

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
1.0%
58th percentile
Exploitation Status
Not in CISA KEV