VULNERABILITY INTELLIGENCE

CVE-2026-42009

CVSS score7.5 HIGH
EPSS probability1.33%
CISA KEVNot currently listed
Published2026-05-18
Last modified2026-10-30
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-475
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-475

Primary references