CVE-2026-4891

MEDIUM EPSS 90.2%

Published May 11, 20261mo ago · Modified Jun 17, 20261w ago

5.3 CVSS 3.1

Medium

Published May 11, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

5.3

Exploitability

3.9

Impact

1.4

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality Low

Integrity None

Availability None

Threat Intelligence

EPSS Exploit Probability

90.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

References 6

github.com 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
lists.thekelleys.org.uk https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html
thekelleys.org.uk https://thekelleys.org.uk/dnsmasq/CVE/
kb.cert.org https://www.kb.cert.org/vuls/id/471747

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.