Detections
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Unity Linux 20.1060a / 20.1070a Security Update: tigervnc (UTSA-2025-990941)

high Nessus Plugin ID 276634

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-2025-990941 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 tigervnc package.

See Also

http://www.nessus.org/u?1743c618

https://access.redhat.com/security/cve/CVE-2025-62229

https://nvd.nist.gov/vuln/detail/CVE-2025-62229

Plugin Details

Severity: High

ID: 276634

File Name: unity_linux_UTSA-2025-990941.nasl

Version: 1.1

Type: local

Published: 11/24/2025

Updated: 11/24/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.0

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: 11/24/2025

Vulnerability Publication Date: 10/28/2025

Reference Information

CVE: CVE-2025-62229