CVE-2026-50263
CVE-2026-50263
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.
Vulnerability class: Use-After-Free
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-50263?
- CVE-2026-50263 is a medium-severity vulnerability, classified under Use After Free. CVSS score: 5.5/10. Published 2026-06-05.
- How severe is CVE-2026-50263?
- Medium severity. CVSS v3 base score is 5.5 out of 10.