SUSE SLES16 Security Update : xwayland (SUSE-SU-2026:21211-1)

high Nessus Plugin ID 309121

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Synopsis

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

Description

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:21211-1 advisory.

- CVE-2026-33999: XKB Integer Underflow in XkbSetCompatMap() (bsc#1260922).
- CVE-2026-34000: XKB Out-of-bounds Read in CheckSetGeom() (bsc#1260923).
- CVE-2026-34001: XSYNC Use-after-free in miSyncTriggerFence() (bsc#1260924).
- CVE-2026-34002: XKB Out-of-bounds read in CheckModifierMap() (bsc#1260925).
- CVE-2026-34003: XKB Buffer overflow in CheckKeyTypes() (bsc#1260926).

Tenable has extracted the preceding description block directly from the SUSE 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 xwayland and / or xwayland-devel packages.

Plugin Details

Severity: High

ID: 309121

File Name: suse_SU-2026-21211-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 4/22/2026

Updated: 4/22/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2026-34001

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/PR:L/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:novell:suse_linux:xwayland-devel, p-cpe:/a:novell:suse_linux:xwayland, cpe:/o:novell:suse_linux:16

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/17/2026

Vulnerability Publication Date: 4/14/2026

Reference Information

CVE: CVE-2026-33999, CVE-2026-34000, CVE-2026-34001, CVE-2026-34002, CVE-2026-34003

IAVA: 2026-A-0351

SuSE: SUSE-SU-2026:21211-1

Detections

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