X.Org Server CreateSaverWindow Use-After-Free Information Disclosure Vulnerability (CVE-2026-50263)

This vulnerability allows local attackers to disclose sensitive information on affected installations of X.Org Server.

An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of ScreenSaverScreenPrivateRec objects.

The issue results from the lack of validating the existence of an object prior to performing operations on the object.

An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.

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