What is RHSA-2026:38490?

RHSA-2026:38490 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: xorg-x11-server-Xwayland security update

Which CVE IDs does RHSA-2026:38490 cover?

RHSA-2026:38490 covers the following CVE IDs: CVE-2026-55999, CVE-2026-56000. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:38490?

RHSA-2026:38490 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

Which products are affected by RHSA-2026:38490?

RHSA-2026:38490 affects 31 products, including: Red Hat Enterprise Linux AppStream (v. 9); Red Hat Enterprise Linux CodeReady Linux Builder (v. 9); xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9); xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); and others — see the full list on the advisory page.

RHSA-2026:38490HighCVSS 7.5

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

Vendor

Red Hat Product Security

Published

July 13, 2026

Last Modified

August 3, 2026

🔗 CVE IDs covered (2)

CVE-2026-55999 →CVE-2026-56000 →

📋 Description

CVE-2026-55999 — xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow CVE-2026-56000 — X.org: xorg-x11-server: GLX contextTags Use-After-Free in CommonMakeCurrent()

🎯 Affected products31

Red Hat Enterprise Linux AppStream (v. 9)
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debuginfo-0:24.1.9-4.el9_8.3.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
xorg-x11-server-Xwayland-debugsource-0:24.1.9-4.el9_8.3.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-devel-0:24.1.9-4.el9_8.3.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-devel-0:24.1.9-4.el9_8.3.i686 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-devel-0:24.1.9-4.el9_8.3.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
xorg-x11-server-Xwayland-devel-0:24.1.9-4.el9_8.3.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
+1 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 (2)

📋 Description

🎯 Affected products31

✅ Remediation

🔗 References (5)