> CVE-2025-9820 [MEDIUM]

« BACK_TO_HOME
PUBLISHED
2026-01-26 20:16
MODIFIED
2026-01-26 20:16
CVSS_SCORE V3
4.0
EPSS (Prob. Exploit)
0.22%
Top 87.1%
DATA SOURCES:
NVD đź”— 2026-01-26 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 OSV đź”— 2026-11-08

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EXPLOITABILITY
2.5
IMPACT
1.4

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-121

> CWE DETAILED DESCRIPTIONS

CWE-121: Stack-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the stack.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: gnutls security update
An update for gnutls is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: gnutls security update
An update for gnutls is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CV...
Red Hat Security Advisory: Insights proxy Container Image
Initial GA Release of Red Hat Insights proxy
Red Hat Security Advisory: Red Hat Update Infrastructure 5.1 security update
The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
Red Hat Security Advisory: gnutls security update
An update for gnutls is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CV...
Red Hat Security Advisory: Red Hat Ceph Storage
A new version of Red Hat build of Ceph Storage has been released
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: updated RHEL-8 based Middleware Containers container images
Updated RHEL-8 based Middleware Containers container images are now available
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function

AFFECTED PACKAGES:
Unknown / Unknown
10 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
26/01/2026 20:16
Source: NVD
đź“Š ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-121: Stack-based Buffer Overflow - A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a para...
Nouvelle valeur:
CWE-121: Stack-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the stack.
đź“Š ENRICHISSEMENT 01/02/2026 06:45
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-121: Stack-based Buffer Overflow - A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a para...
Total des modifications: 2 Dernière mise à jour: 1 week ago

> REFERENCES

https://access.redhat.com/security/cve/CVE-2025-9820
https://bugzilla.redhat.com/show_bug.cgi?id=2392528
https://gitlab.com/gnutls/gnutls/-/commit/1d56f96f6ab5034d677136b9d50b5a75dff0fa...
https://gitlab.com/gnutls/gnutls/-/issues/1732
https://www.gnutls.org/security-new.html#GNUTLS-SA-2025-11-18
http://www.openwall.com/lists/oss-security/2025/11/20/2
« BACK_TO_HOME