CVEvulnerability

CVE-2026-42009

7.5 HIGH Published 2026-05-18 Modified 2026-10-26 Official page ↗
Status
Modified
Published
2026-05-18
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-475

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.

Affected configurations

• gnu gnutls • redhat hardened images • redhat openshift container platform 4.0 • redhat enterprise linux 6.0 • redhat enterprise linux 7.0 • redhat enterprise linux 8.0 • redhat enterprise linux for els 8.10 • redhat enterprise linux for ibm z systems 8.0 s390x • redhat enterprise linux for ibm z systems els 8.10 • redhat enterprise linux for power little endian 8.0 ppc64le • redhat enterprise linux for power little endian els 8.10 • redhat enterprise linux 9.0 • redhat enterprise linux 9.8 • redhat enterprise linux for els 9.8 • redhat enterprise linux for eus 9.8 • redhat enterprise linux for ibm z systems 9.0 s390x • redhat enterprise linux for ibm z systems els 9.8 • redhat enterprise linux for ibm z systems eus 9.8 • redhat enterprise linux for power little endian 9.0 ppc64le • redhat enterprise linux for power little endian els 9.8 • redhat enterprise linux for power little endian eus 9.8 • redhat enterprise linux for update services for sap solutions 9.8 • redhat enterprise linux server for power little endian update services for sap solutions 9.8 • redhat enterprise linux 10.0 • redhat enterprise linux 10.2 • redhat enterprise linux for els 10.2 • redhat enterprise linux for eus 10.2 • redhat enterprise linux for ibm z systems 10.2 • redhat enterprise linux for ibm z systems els 10.2 • redhat enterprise linux for ibm z systems eus 10.2 • redhat enterprise linux for power little endian 10.0 • redhat enterprise linux for power little endian 10.2 • redhat enterprise linux for power little endian els 10.2 • redhat enterprise linux for power little endian eus 10.2

Related

Weakness · CWE (1)

  • CWE-475 Undefined Behavior for Input to API weakness

References