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Alerts This Week
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SUSE Linux Enterprise Server 16.0 xwayland Important Issues 2026-21211-1

suse
Calendar Grey April 21, 2026
Dist Suse Esm H88
Critical update for SUSE xwayland addresses five important security issues, including buffer overflow and more.
An update that solves five vulnerabilities can now be installed.

Summary

## This update for xwayland fixes the following issues: * 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). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-583=1 * SUSE Linux Enterprise Server 16.0

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE DoS important Xwayland

References

* bsc#1260922

* bsc#1260923

* bsc#1260924

* bsc#1260925

* bsc#1260926

Cross-

* CVE-2026-33999

* CVE-2026-34000

* CVE-2026-34001

* CVE-2026-34002

* CVE-2026-34003

CVSS scores:

* CVE-2026-33999 ( SUSE ): 6.9

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2026-33999 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

* CVE-2026-34000 ( SUSE ): 6.9

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2026-34000 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

* CVE-2026-34001 ( SUSE ): 7.3

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-34001 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-34002 ( SUSE ): 6.9

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21211-1
Release Date: 2026-04-17T07:57:12Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE DoS important Xwayland

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