Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: xorg-x11-server (UTSA-2026-006161)

high Nessus Plugin ID 302294

Synopsis

The Unity Linux host is missing one or more security updates.

Description

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006161 advisory.

A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications.
Improper error handling during notification creation can leave dangling pointers that lead to a use-after- free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected xorg-x11-server package.

Plugin Details

Severity: High

ID: 302294

File Name: unity_linux_UTSA-2026-006161.nasl

Version: 1.1

Type: local

Family: Unity Linux Local Security Checks

Published: 3/15/2026

Updated: 3/15/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2025-62229

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/15/2026

Vulnerability Publication Date: 10/29/2025

Reference Information

CVE: CVE-2025-62229

Detections

Analytics