Undefined Behavior for Input to API Affecting gnutls-utils package, versions <0:3.6.16-8.el8_10.6


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
1.34% (68th percentile)

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  • Snyk IDSNYK-ALMALINUX8-GNUTLSUTILS-16960300
  • published28 May 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-42009  (opens in a new tab)
CWE-475  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 gnutls-utils to version 0:3.6.16-8.el8_10.6 or higher.
This issue was patched in ALSA-2026:20611.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls-utils package and not the gnutls-utils package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1