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Vulnerabilities CVE-2026-50262

CVE-2026-50262

Medium
Open
TLP:CLEAR

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes

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Description

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.

Details

CVSS Score
5.5
EPSS Score
0.13%

3.2th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Confidence
90%
Published
Jun 5, 2026
Last Modified
Aug 4, 2026
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