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Stack-based Buffer Overflow The advisory has been revoked - it doesn't affect any version of package gnutls28  (opens in a new tab)

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EPSS
0.22% (13th percentile)

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  • Snyk IDSNYK-UBUNTU2604-GNUTLS28-16237610
  • published24 Apr 2026
  • disclosed26 Jan 2026
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Introduced: 26 Jan 2026

CVE-2025-9820  (opens in a new tab)
CWE-121  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:26.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Ubuntu.

A flaw was found in the GnuTLS library, specifically in the gnutls_pkcs11_token_init() function that handles PKCS#11 token initialization. When a token label longer than expected is processed, the function writes past the end of a fixed-size stack buffer. This programming error can cause the application using GnuTLS to crash or, in certain conditions, be exploited for code execution. As a result, systems or applications relying on GnuTLS may be vulnerable to a denial of service or local privilege escalation attacks.

References