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Linux Distros Unpatched Vulnerability : CVE-2025-62231

critical Nessus Plugin ID 271920

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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 identified in the X.Org X server's X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.
 (CVE-2025-62231)

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

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-62231

https://security-tracker.debian.org/tracker/CVE-2025-62231

https://ubuntu.com/security/CVE-2025-62231

Plugin Details

Severity: Critical

ID: 271920

File Name: unpatched_CVE_2025_62231.nasl

Version: 1.3

Type: local

Agent: unix

Family: Misc.

Published: 10/28/2025

Updated: 10/30/2025

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: High

Base Score: 7.5

Temporal Score: 6.4

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

CVSS Score Source: CVE-2025-62231

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

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

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:tigervnc-server-applet, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xwayland-devel, p-cpe:/a:redhat:enterprise_linux:tigervnc-license, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xorg, p-cpe:/a:centos:centos:xorg-x11-server, p-cpe:/a:centos:centos:xorg-x11-server-xwayland-devel, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:canonical:ubuntu_linux:xorg-server-hwe-16.04, p-cpe:/a:redhat:enterprise_linux:tigervnc-server, p-cpe:/a:centos:centos:xorg-x11-server-devel, p-cpe:/a:debian:debian_linux:xwayland, p-cpe:/a:debian:debian_linux:xorg-server, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:xorg-x11-server-source, p-cpe:/a:centos:centos:tigervnc-selinux, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xvfb, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal, p-cpe:/a:centos:centos:tigervnc-icons, p-cpe:/a:centos:centos:xorg-x11-server-xorg, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-common, p-cpe:/a:centos:centos:xorg-x11-server-xvfb, p-cpe:/a:canonical:ubuntu_linux:xorg-server-hwe-18.04, p-cpe:/a:centos:centos:xorg-x11-server-common, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-applet, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xwayland, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xephyr, p-cpe:/a:centos:centos:xorg-x11-server-xdmx, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:tigervnc, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:xorg-x11-server-xnest, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-devel, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-module, p-cpe:/a:centos:centos:tigervnc-license, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xnest, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server, p-cpe:/a:canonical:ubuntu_linux:xorg-server, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-source, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:centos:centos:xorg-x11-server-xwayland, p-cpe:/a:redhat:enterprise_linux:tigervnc-selinux, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xdmx, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:tigervnc-icons, p-cpe:/a:centos:centos:xorg-x11-server-xephyr, p-cpe:/a:centos:centos:tigervnc-server-module, p-cpe:/a:centos:centos:tigervnc, p-cpe:/a:centos:centos:tigervnc-server-minimal, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:redhat:enterprise_linux:6, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:tigervnc-server

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-2025-62231