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.

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6264-1 dnsmasq security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 11 May 2026 23:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125

Mon, 11 May 2026 21:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125

Mon, 11 May 2026 20:45:00 +0000

Type Values Removed Values Added
References

Mon, 11 May 2026 19:30:00 +0000

Type Values Removed Values Added
References

Mon, 11 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 11 May 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Dnsmasq
Dnsmasq dnsmasq
Weaknesses CWE-125
Vendors & Products Dnsmasq
Dnsmasq dnsmasq

Mon, 11 May 2026 18:45:00 +0000


Mon, 11 May 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Title CVE-2026-4891
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-05-11T19:58:20.665Z

Reserved: 2026-03-26T13:07:05.406Z

Link: CVE-2026-4891

cve-icon Vulnrichment

Updated: 2026-05-11T18:27:24.527Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-11T18:16:41.380

Modified: 2026-05-12T14:15:46.747

Link: CVE-2026-4891

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T23:30:02Z

Weaknesses