What is RHSA-2026:99611?

RHSA-2026:99611 is a security advisory published by Red Hat Product Security with Medium severity. Red Hat Security Advisory: xorg-x11-server security update

Which CVE IDs does RHSA-2026:99611 cover?

RHSA-2026:99611 covers the following CVE IDs: CVE-2026-93520. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:99611?

RHSA-2026:99611 has a CVSS v3 base score of 7.8, published by Red Hat Product Security.

Which products are affected by RHSA-2026:99611?

RHSA-2026:99611 affects 96 products, including: Red Hat Enterprise Linux AppStream (v. 9); Red Hat Enterprise Linux CodeReady Linux Builder (v. 9); xorg-x11-server-0:1.20.11-39.el9_9.1.src as a component of Red Hat Enterprise Linux AppStream (v. 9); xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); and others — see the full list on the advisory page.

RHSA-2026:99611MediumCVSS 7.8

Red Hat Security Advisory: xorg-x11-server security update

Vendor

Red Hat Product Security

Published

November 12, 2026

Last Modified

November 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-93520 →

📋 Description

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

🎯 Affected products96

Red Hat Enterprise Linux AppStream (v. 9)
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-0:1.20.11-39.el9_9.1.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xephyr-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-39.el9_9.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xnest-0:1.20.11-39.el9_9.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
+66 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products96

✅ Remediation

🔗 References (4)