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


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.82% (53rd percentile)

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  • Snyk IDSNYK-ORACLE8-GNUTLS-17139665
  • published3 Jun 2026
  • disclosed18 May 2026

Introduced: 18 May 2026

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

How to fix?

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

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls package and not the gnutls package as distributed by Oracle. See How to fix? for Oracle: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