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Vulnerability IntelligenceCVE-2026-4890

CVE-2026-4890

HIGH7.5

CVE-2026-4890

Published May 11, 2026

Modified 5 days ago

Details

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.

References

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

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

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

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

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

https://www.cve.org/CVERecord?id=CVE-2026-4890

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

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Ecosystems

Timeline

PublishedMay 11, 2026

ModifiedMay 20, 2026

CVE-2026-4890 | Mondoo Vulnerability Intelligence