VULNERABILITY INTELLIGENCE
CVE-2025-9820
CVSS score4 MEDIUM
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-01-26
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Description
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.
Weakness classification
- secalert@redhat.com: CWE-121