CVE-2025-9820
Discovered by AISLEPUBLISHEDCWE-121
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.
CVSS Base Scores
CVSS v3.1(Primary)
4.0CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| gnutls | 3.8.1 | affected | |
| gnutls | 3.8.2 | affected | |
| gnutls | 3.8.3 | affected | |
| gnutls | 3.8.4 | affected | |
| gnutls | 3.8.5 | affected | |
| gnutls | 3.8.6 | affected | |
| gnutls | 3.8.7 | affected | |
| gnutls | 3.8.8 | affected | |
| gnutls | 3.8.9 | affected | |
| gnutls | 3.8.10 | affected | |
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.8.10-3.el10_1 | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.6.16-8.el8_10.5 | unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.8.3-10.el9_7 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325677 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325711 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325710 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-3.1777325680 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325709 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325680 | unaffected |
| Red Hat | RHEL-8 based Middleware Containers | 7.13.5-4.1777325708 | unaffected |
| Red Hat | Red Hat Ceph Storage 8 | 1774002867 | unaffected |
| Red Hat | Red Hat Discovery 2 | 1775668717 | unaffected |
| Red Hat | Red Hat Discovery 2 | 1775675922 | unaffected |
| Red Hat | Red Hat Hardened Images | 3.8.12-1.1.hum1 | unaffected |
| Red Hat | Red Hat Insights proxy 1.5 | 1773685509 | unaffected |
| Red Hat | Red Hat Update Infrastructure 5 | 1773670073 | unaffected |
| Red Hat | Red Hat Update Infrastructure 5 | 1773672059 | unaffected |
| Red Hat | Red Hat Update Infrastructure 5 | 1773668803 | unaffected |
| Red Hat | Red Hat Update Infrastructure 5 | 1773670137 | unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
References
- https://access.redhat.com/errata/RHSA-2026:13812
- https://access.redhat.com/errata/RHSA-2026:3477
- https://access.redhat.com/errata/RHSA-2026:4188
- https://access.redhat.com/errata/RHSA-2026:4655
- https://access.redhat.com/errata/RHSA-2026:4943
- https://access.redhat.com/errata/RHSA-2026:5585
- https://access.redhat.com/errata/RHSA-2026:5606
- https://access.redhat.com/errata/RHSA-2026:7329
- https://access.redhat.com/errata/RHSA-2026:7477
- https://access.redhat.com/security/cve/CVE-2025-9820
- https://bugzilla.redhat.com/show_bug.cgi?id=2392528
- https://gitlab.com/gnutls/gnutls/-/commit/1d56f96f6ab5034d677136b9d50b5a75dff0faf5
- https://gitlab.com/gnutls/gnutls/-/issues/1732
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2025-11-18