CVE-2026-123584

MediumCVSS 5.9/10Last modified Nov 12, 2026

Description

The hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 stops listening and returns an error when a client UDP connection receives a datagram that cannot be parsed as a DNS message. Remote attackers who guess the query's source port, without knowing the transaction ID, can spoof malformed responses to abort client queries, causing denial of service.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-696

Affected software

No affected versions have been published.

Timeline

Published: Nov 8, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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