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Unity Linux 20.1060a / 20.1070a Security Update: tigervnc (UTSA-2025-990940)

high Nessus Plugin ID 276633

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-2025-990940 advisory.

 A flaw was discovered in the X.Org X servers X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.

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?b39eb74b

https://access.redhat.com/security/cve/CVE-2025-62230

https://nvd.nist.gov/vuln/detail/CVE-2025-62230

Plugin Details

Severity: High

ID: 276633

File Name: unity_linux_UTSA-2025-990940.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: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2025-62230

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:H/I:L/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-2025-62230