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RLSA-2026:84574

Security Mirrored from RHSA-2026:84574
Issued at: 2026-10-20
Updated at: 2026-10-20

Advisory content derived from Red Hat RHSA-2026:84574, © Red Hat, Inc., used under CC BY 4.0, with modifications.

Synopsis

Important: xorg-x11-server security update



Description

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Security Fix(es):

* xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516)

* xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)

* xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)

* xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)

* xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.



Affected products

Rocky Linux 9 aarch64 Rocky Linux 9 ppc64le Rocky Linux 9 s390x Rocky Linux 9 x86_64

Fixes

2545161 2545246 2545860 2545887 2545908

CVEs

CVE-2026-93516 CVE-2026-93517 CVE-2026-93518 CVE-2026-93519 CVE-2026-93520

Affected packages

Rocky Linux 9 x86_64 - AppStream

xorg-x11-server-0:1.20.11-34.el9_8.5.src.rpm xorg-x11-server-common-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xdmx-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xephyr-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xnest-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xorg-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xvfb-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.x86_64.rpm

Rocky Linux 9 aarch64 - AppStream

xorg-x11-server-0:1.20.11-34.el9_8.5.src.rpm xorg-x11-server-common-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xdmx-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xephyr-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xnest-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xorg-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xvfb-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.aarch64.rpm

Rocky Linux 9 s390x - AppStream

xorg-x11-server-0:1.20.11-34.el9_8.5.src.rpm xorg-x11-server-common-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xdmx-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xephyr-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xnest-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xorg-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xvfb-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.s390x.rpm

Rocky Linux 9 ppc64le - AppStream

xorg-x11-server-0:1.20.11-34.el9_8.5.src.rpm xorg-x11-server-common-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xdmx-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xephyr-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xnest-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xorg-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xvfb-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-34.el9_8.5.ppc64le.rpm

Rocky Linux 9 x86_64 - CRB

xorg-x11-server-debugsource-0:1.20.11-34.el9_8.5.i686.rpm xorg-x11-server-devel-0:1.20.11-34.el9_8.5.i686.rpm xorg-x11-server-devel-0:1.20.11-34.el9_8.5.x86_64.rpm xorg-x11-server-source-0:1.20.11-34.el9_8.5.noarch.rpm

Rocky Linux 9 aarch64 - CRB

xorg-x11-server-devel-0:1.20.11-34.el9_8.5.aarch64.rpm xorg-x11-server-source-0:1.20.11-34.el9_8.5.noarch.rpm

Rocky Linux 9 ppc64le - CRB

xorg-x11-server-devel-0:1.20.11-34.el9_8.5.ppc64le.rpm xorg-x11-server-source-0:1.20.11-34.el9_8.5.noarch.rpm

Rocky Linux 9 s390x - CRB

xorg-x11-server-devel-0:1.20.11-34.el9_8.5.s390x.rpm xorg-x11-server-source-0:1.20.11-34.el9_8.5.noarch.rpm