openSUSE-SU-2026:21283-1: important: Security update for xwayland

openSUSE security update: security update for xwayland
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Announcement ID: openSUSE-SU-2026:21283-1
Rating: important
References:

  * bsc#1268893
  * bsc#1268894



Cross-References:

  * CVE-2026-55999
  * CVE-2026-56000



CVSS scores:

  * CVE-2026-55999 ( SUSE ): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-55999 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56000 ( SUSE ): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-56000 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

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An update that solves 2 vulnerabilities and has 2 bug fixes can now be installed.

Description:

This update for xwayland fixes the following issues

- CVE-2026-55999: missing bounds check in `glamor_font_get` can lead to a heap buffer overflow when a font loaded from
  a malicious PCF file is processed (bsc#1268893).
- CVE-2026-56000: improper memory management in `CommonMakeCurrent` can lead to a heap use-after-free when an
  interaction with a malicious client creating GLX contexts happens (bsc#1268894).
  

Patch instructions:

   To install this openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-1194=1

Package List:

- openSUSE Leap 16.0:

  xwayland-24.1.6-160000.6.1
  xwayland-devel-24.1.6-160000.6.1

References:

  * https://www.suse.com/security/cve/CVE-2026-55999.html
  * https://www.suse.com/security/cve/CVE-2026-56000.html