Detections
Analytics

AlmaLinux 8 : tigervnc (ALSA-2026:13414)

critical Nessus Plugin ID 312262

Synopsis

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

Description

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:13414 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 AlmaLinux 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.

See Also

https://errata.almalinux.org/8/ALSA-2026-13414.html

https://access.redhat.com/errata/RHSA-2026:13414

Plugin Details

Severity: Critical

ID: 312262

File Name: alma_linux_ALSA-2026-13414.nasl

Version: 1.1

Type: Local

Published: 5/5/2026

Updated: 5/5/2026

Supported Sensors: Continuous Assessment, Nessus Agent, 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:alma:linux:tigervnc-icons, p-cpe:/a:alma:linux:tigervnc-license, p-cpe:/a:alma:linux:tigervnc-selinux, p-cpe:/a:alma:linux:tigervnc-server, p-cpe:/a:alma:linux:tigervnc-server-module, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::appstream, p-cpe:/a:alma:linux:tigervnc-server-minimal, p-cpe:/a:alma:linux:tigervnc, cpe:/o:alma:linux:8::supplementary

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/4/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

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

CWE: 125, 191, 279, 825

RHSA: 2026:13414