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RHEL 8 : tigervnc (RHSA-2025:19909)

high Nessus Plugin ID 274384

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Synopsis

The remote Red Hat host is missing one or more security updates for tigervnc.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:19909 advisory.

 Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

 Security Fix(es):

 * xorg: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229)

 * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230)

 * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

Solution

Update the RHEL tigervnc package based on the guidance in RHSA-2025:19909.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2402649

https://bugzilla.redhat.com/show_bug.cgi?id=2402653

https://bugzilla.redhat.com/show_bug.cgi?id=2402660

http://www.nessus.org/u?8a2e54cd

https://access.redhat.com/errata/RHSA-2025:19909

Plugin Details

Severity: High

ID: 274384

File Name: redhat-RHSA-2025-19909.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/7/2025

Updated: 11/7/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.0

Vendor

Vendor Severity: Important

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

CPE: p-cpe:/a:redhat:enterprise_linux:tigervnc-server, p-cpe:/a:redhat:enterprise_linux:tigervnc-license, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:tigervnc, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-module, p-cpe:/a:redhat:enterprise_linux:tigervnc-icons, p-cpe:/a:redhat:enterprise_linux:tigervnc-selinux

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/6/2025

Vulnerability Publication Date: 10/28/2025

Reference Information

CVE: CVE-2025-62229, CVE-2025-62230, CVE-2025-62231

CWE: 190, 416

RHSA: 2025:19909