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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Solution

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Workaround

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History

Thu, 11 Jun 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared X.org
X.org x Server
X.org xwayland
CPEs cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
Vendors & Products X.org
X.org x Server
X.org xwayland

Mon, 08 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 05 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Fri, 05 Jun 2026 11:45:00 +0000

Type Values Removed Values 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.
Title Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-416
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-06-11T18:15:29.552Z

Reserved: 2026-06-04T14:55:24.012Z

Link: CVE-2026-50263

cve-icon Vulnrichment

Updated: 2026-06-08T16:01:24.631Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-05T12:16:39.927

Modified: 2026-06-11T19:46:41.940

Link: CVE-2026-50263

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-02T00:00:00Z

Links: CVE-2026-50263 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-07T11:17:03Z

Weaknesses