Security update for xorg-x11-server

Announcement ID:	SUSE-SU-2026:1333-1
Release Date:	2026-04-14T17:19:03Z
Rating:	important
References:	bsc#1260922 bsc#1260923 bsc#1260924 bsc#1260925 bsc#1260926
Cross-References:	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 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-2026-34002 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H CVE-2026-34003 ( 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-2026-34003 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Affected Products:	openSUSE Leap 15.4 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP4 LTSS SUSE Linux Enterprise Server for SAP Applications 15 SP4

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).

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 15.4
  zypper in -t patch SUSE-2026-1333=1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1333=1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1333=1
• SUSE Linux Enterprise Server 15 SP4 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-1333=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-1333=1

Package List:

• openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
  • xorg-x11-server-extra-1.20.3-150400.38.68.1
  • xorg-x11-server-extra-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debugsource-1.20.3-150400.38.68.1
  • xorg-x11-server-source-1.20.3-150400.38.68.1
  • xorg-x11-server-1.20.3-150400.38.68.1
  • xorg-x11-server-sdk-1.20.3-150400.38.68.1
• SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64 x86_64)
  • xorg-x11-server-extra-1.20.3-150400.38.68.1
  • xorg-x11-server-extra-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debugsource-1.20.3-150400.38.68.1
  • xorg-x11-server-1.20.3-150400.38.68.1
  • xorg-x11-server-sdk-1.20.3-150400.38.68.1
• SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64 x86_64)
  • xorg-x11-server-extra-1.20.3-150400.38.68.1
  • xorg-x11-server-extra-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debugsource-1.20.3-150400.38.68.1
  • xorg-x11-server-1.20.3-150400.38.68.1
  • xorg-x11-server-sdk-1.20.3-150400.38.68.1
• SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 ppc64le s390x x86_64)
  • xorg-x11-server-extra-1.20.3-150400.38.68.1
  • xorg-x11-server-extra-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debugsource-1.20.3-150400.38.68.1
  • xorg-x11-server-1.20.3-150400.38.68.1
  • xorg-x11-server-sdk-1.20.3-150400.38.68.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)
  • xorg-x11-server-extra-1.20.3-150400.38.68.1
  • xorg-x11-server-extra-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debuginfo-1.20.3-150400.38.68.1
  • xorg-x11-server-debugsource-1.20.3-150400.38.68.1
  • xorg-x11-server-1.20.3-150400.38.68.1
  • xorg-x11-server-sdk-1.20.3-150400.38.68.1

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