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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.
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CVE Modified by Red Hat, Inc.6/17/2026 10:16:20 PM
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Initial Analysis by NIST6/11/2026 3:46:41 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* versions up to (excluding) 21.1.23
*cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:* versions up to (excluding) 24.1.12
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-50263 Types: Third Party Advisory
Added
Reference Type
Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2485388 Types: Issue Tracking, Third Party Advisory
Added
Reference Type
Red Hat, Inc.: https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05 Types: Patch
Added
Reference Type
Red Hat, Inc.: https://lists.x.org/archives/xorg-announce/2026-June/003702.html Types: Mailing List, Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://redhat.atlassian.net/browse/PSIRTSUPT-16950 Types: Permissions Required
New CVE Received from Red Hat, Inc.6/05/2026 8:16:39 AM
Action
Type
Old Value
New Value
Added
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.
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