CVE-2026-50262
Medium · 5.5CVSS
5.5
EPSS
0.1%
Published
Jun 5, 2026
CISA due date
—
The record
An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes(). A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to information disclosure. A write path also exists but requires byte-swapped clients which is disabled by default.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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