CVE-2026-50263 – Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()

CVE ID :CVE-2026-50263

Published : June 5, 2026, 12:16 p.m. | 16 minutes ago

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.

Severity: 5.5 | MEDIUM

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