CVE-2026-50263
MEDIUM
NVD
CVSS Score
5.5
Severity
MEDIUM
Published
Jun 05, 2026
Vendor
unknown
Description
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.
References
- https://access.redhat.com/security/cve/CVE-2026-50263
- https://bugzilla.redhat.com/show_bug.cgi?id=2485388
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05
- https://lists.x.org/archives/xorg-announce/2026-June/003702.html
- https://redhat.atlassian.net/browse/PSIRTSUPT-16950