RockyLinux 9 : tigervnc (RLSA-2026:10739)

critical Nessus Plugin ID 310566

Synopsis

The remote RockyLinux host is missing one or more security updates.

Description

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:10739 advisory.

* xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999)

* xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001)

* xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003)

* TigerVNC: x0vncserver: TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions (CVE-2026-34352)

Tenable has extracted the preceding description block directly from the RockyLinux 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 affected packages.

Plugin Details

Severity: Critical

ID: 310566

File Name: rocky_linux_RLSA-2026-10739.nasl

Version: 1.1

Type: Local

Family: Rocky Linux Local Security Checks

Published: 4/28/2026

Updated: 4/28/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-34352

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:rocky:linux:tigervnc, p-cpe:/a:rocky:linux:tigervnc-debuginfo, p-cpe:/a:rocky:linux:tigervnc-icons, p-cpe:/a:rocky:linux:tigervnc-license, p-cpe:/a:rocky:linux:tigervnc-selinux, p-cpe:/a:rocky:linux:tigervnc-server-debuginfo, cpe:/o:rocky:linux:9, p-cpe:/a:rocky:linux:tigervnc-debugsource, p-cpe:/a:rocky:linux:tigervnc-server, p-cpe:/a:rocky:linux:tigervnc-server-minimal, p-cpe:/a:rocky:linux:tigervnc-server-minimal-debuginfo, p-cpe:/a:rocky:linux:tigervnc-server-module, p-cpe:/a:rocky:linux:tigervnc-server-module-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

CVE: CVE-2026-33999, CVE-2026-34001, CVE-2026-34003, CVE-2026-34352

Detections

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