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CVE-2025-9820
medium
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.
References
https://www.gnutls.org/security-new.html#GNUTLS-SA-2025-11-18
https://gitlab.com/gnutls/gnutls/-/issues/1732
https://gitlab.com/gnutls/gnutls/-/commit/1d56f96f6ab5034d677136b9d50b5a75dff0faf5
https://bugzilla.redhat.com/show_bug.cgi?id=2392528