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Vulnerabilities CVE-2026-42009

CVE-2026-42009

High
Open
TLP:CLEAR

Gnutls: gnutls: denial of service via dtls packet reordering vulnerability

NVD CVE.org
Critical Infrastructure DDoS

AI Analysis

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Description

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

Details

CVSS Score
7.5
EPSS Score
1.34%

68.8th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
May 18, 2026
Last Modified
Aug 21, 2026
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