Linux Distros Unpatched Vulnerability : CVE-2025-9820

high Nessus Plugin ID 276645

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- 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. (CVE-2025-9820)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 276645

File Name: unpatched_CVE_2025_9820.nasl

Version: 1.7

Type: local

Agent: unix

Family: Misc.

Published: 11/24/2025

Updated: 1/30/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 3.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2025-9820

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:gnutls-guile, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:canonical:ubuntu_linux:gnutls28, p-cpe:/a:centos:centos:gnutls-utils, cpe:/o:debian:debian_linux:12.0, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:gnutls-dane, cpe:/o:redhat:enterprise_linux:9, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:gnutls, p-cpe:/a:redhat:enterprise_linux:gnutls-fips, p-cpe:/a:centos:centos:gnutls-devel, p-cpe:/a:redhat:enterprise_linux:gnutls-guile, p-cpe:/a:debian:debian_linux:gnutls28, p-cpe:/a:centos:centos:gnutls-c%2b%2b, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:gnutls, p-cpe:/a:redhat:enterprise_linux:gnutls-dane, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:gnutls-c%2b%2b, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:redhat:enterprise_linux:gnutls-utils, p-cpe:/a:redhat:enterprise_linux:gnutls-devel, p-cpe:/a:centos:centos:gnutls-fips

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-9820

Detections

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