PT-2026-46943 · Red Hat · Red Hat Enterprise Linux 10+4

Published 2026-06-05 · Updated 2026-06-05 · CVE-2026-50263

NVD

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-50263

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-50263 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2485388 · Note
• https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05 · Note
• https://access.redhat.com/security/cve/CVE-2026-50263 · Note
• https://redhat.atlassian.net/browse/PSIRTSUPT-16950 · Note
• https://lists.x.org/archives/xorg-announce/2026-June/003702.html · Note