RLSA-2026:11388

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: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999)

* xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001)

* xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003)

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

2451106 2451109 2451113

CVEs

CVE-2026-33999 CVE-2026-34001 CVE-2026-34003

Affected packages

Rocky Linux 9 x86_64 - AppStream

xorg-x11-server-0:1.20.11-33.el9_7.src.rpm xorg-x11-server-common-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-debugsource-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xdmx-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xephyr-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xnest-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xorg-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xvfb-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-33.el9_7.x86_64.rpm

Rocky Linux 9 aarch64 - AppStream

xorg-x11-server-0:1.20.11-33.el9_7.src.rpm xorg-x11-server-common-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-debugsource-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xdmx-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xephyr-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xnest-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xorg-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xvfb-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-33.el9_7.aarch64.rpm

Rocky Linux 9 s390x - AppStream

xorg-x11-server-0:1.20.11-33.el9_7.src.rpm xorg-x11-server-common-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-debuginfo-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-debugsource-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xdmx-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xephyr-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xnest-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xorg-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xvfb-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-33.el9_7.s390x.rpm

Rocky Linux 9 ppc64le - AppStream

xorg-x11-server-0:1.20.11-33.el9_7.src.rpm xorg-x11-server-common-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-debugsource-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xdmx-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xdmx-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xephyr-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xephyr-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xnest-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xnest-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xorg-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xorg-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xvfb-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-Xvfb-debuginfo-0:1.20.11-33.el9_7.ppc64le.rpm

Rocky Linux 9 x86_64 - CRB

xorg-x11-server-debugsource-0:1.20.11-33.el9_7.i686.rpm xorg-x11-server-devel-0:1.20.11-33.el9_7.i686.rpm xorg-x11-server-devel-0:1.20.11-33.el9_7.x86_64.rpm xorg-x11-server-source-0:1.20.11-33.el9_7.noarch.rpm

Rocky Linux 9 aarch64 - CRB

xorg-x11-server-devel-0:1.20.11-33.el9_7.aarch64.rpm xorg-x11-server-source-0:1.20.11-33.el9_7.noarch.rpm

Rocky Linux 9 ppc64le - CRB

xorg-x11-server-devel-0:1.20.11-33.el9_7.ppc64le.rpm xorg-x11-server-source-0:1.20.11-33.el9_7.noarch.rpm

Rocky Linux 9 s390x - CRB

xorg-x11-server-devel-0:1.20.11-33.el9_7.s390x.rpm xorg-x11-server-source-0:1.20.11-33.el9_7.noarch.rpm