What is RHSA-2026:38489?

RHSA-2026:38489 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-2026:38489 cover?

RHSA-2026:38489 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-2026:38489?

RHSA-2026:38489 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

RHSA-2026:38489HighCVSS 7.5

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

Vendor

Red Hat Product Security

Published

July 13, 2026

Last Modified

July 13, 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()

🔗 References (5)

selfhttps://access.redhat.com/errata/RHSA-2026:38489
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2496165
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2496193
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_38489.json