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openSUSE 2026 xorg-x11-server Important DoS Issues SUSE-SU-2026-1331-1

opensuse
Calendar Grey April 15, 2026
Dist Opensuse Esm H88
Patch for five important vulnerabilities in openSUSE xorg-x11-server. Upgrade now for improved security.
An update that solves five vulnerabilities can now be installed.

Description

This update for xorg-x11-server 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).

Topics%20covered

Topics Covered

security advisory buffer overflow DoS important Xorg server OpenSUSE

Patch

## 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:

* openSUSE Leap 15.6

zypper in -t patch SUSE-2026-1331=1 openSUSE-SLE-15.6-2026-1331=1

* SUSE Linux Enterprise Server 15 SP6 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-1331=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-1331=1

Package List

* openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586)

* xorg-x11-server-sdk-21.1.11-150600.5.25.1

* xorg-x11-server-source-21.1.11-150600.5.25.1

* xorg-x11-server-21.1.11-150600.5.25.1

* xorg-x11-server-debugsource-21.1.11-150600.5.25.1

* xorg-x11-server-Xvfb-21.1.11-150600.5.25.1

* xorg-x11-server-Xvfb-debuginfo-21.1.11-150600.5.25.1

* xorg-x11-server-extra-21.1.11-150600.5.25.1

* xorg-x11-server-extra-debuginfo-21.1.11-150600.5.25.1

* xorg-x11-server-debuginfo-21.1.11-150600.5.25.1

* SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)

* xorg-x11-server-sdk-21.1.11-150600.5.25.1

* xorg-x11-server-21.1.11-150600.5.25.1

* xorg-x11-server-debugsource-21.1.11-150600.5.25.1

* xorg-x11-server-Xvfb-21.1.11-150600.5.25.1

* xorg-x11-server-Xvfb-debuginfo-21.1.11-150600.5.25.1

* xorg-x11-server-extra-21.1.11-150600.5.25.1

* xorg-x11-server-extra-debuginfo-21.1.11-150600.5.25.1

* xorg-x11-server-debuginfo-21.1.11-150600.5.25.1

* SUSE Linux Enterprise Server for SAP Applications 15 SP6...

Read the Full Advisory

References

* bsc#1260922

* bsc#1260923

* bsc#1260924

* bsc#1260925

* bsc#1260926

## References:

* https://www.suse.com/security/cve/CVE-2026-33999.html

* https://www.suse.com/security/cve/CVE-2026-34000.html

* https://www.suse.com/security/cve/CVE-2026-34001.html

* https://www.suse.com/security/cve/CVE-2026-34002.html

* https://www.suse.com/security/cve/CVE-2026-34003.html

* https://bugzilla.suse.com/show_bug.cgi?id=1260922

* https://bugzilla.suse.com/show_bug.cgi?id=1260923

* https://bugzilla.suse.com/show_bug.cgi?id=1260924

* https://bugzilla.suse.com/show_bug.cgi?id=1260925

* https://bugzilla.suse.com/show_bug.cgi?id=1260926

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1331-1
Release Date: 2026-04-14T17:11:42Z
Affected Products: * openSUSE Leap 15.6 * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP6

Topics%20covered

Topics Covered

security advisory buffer overflow DoS important Xorg server OpenSUSE

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