CVE-2026-50263
Last modified
CVE-2026-50263 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| X.Org | X Server | < 21.1.23 |
| X.Org | Xwayland | < 24.1.12 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
References
- https://access.redhat.com/security/cve/CVE-2026-50263Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2485388Issue Tracking, Third Party Advisory
- https://lists.x.org/archives/xorg-announce/2026-June/003702.htmlMailing List, Vendor Advisory
- https://redhat.atlassian.net/browse/PSIRTSUPT-16950Permissions Required
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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