Detections
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Unity Linux 20.1060a / 20.1070a Security Update: tigervnc (UTSA-2025-990942)

high Nessus Plugin ID 276631

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-2025-990942 advisory.

 A flaw was identified in the X.Org X servers 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.

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?0c11a7a8

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

https://nvd.nist.gov/vuln/detail/CVE-2025-62231

Plugin Details

Severity: High

ID: 276631

File Name: unity_linux_UTSA-2025-990942.nasl

Version: 1.1

Type: local

Published: 11/24/2025

Updated: 11/24/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-62231

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-2025-62231