Home

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.

PUBLISHED Reserved 2026-06-04 | Published 2026-06-05 | Updated 2026-06-05 | Assigner redhat




MEDIUM: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

Out-of-bounds Read

Product status

Default status
affected

Default status
unknown

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-05-15:Reported to Red Hat.
2026-06-02:Made public.

Credits

Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.

References

access.redhat.com/security/cve/CVE-2026-50262 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2485387 (RHBZ#2485387) issue-tracking

gitlab.freedesktop.org/...4daf715bea8abdafa8fb130be2f8a1d145

lists.x.org/archives/xorg-announce/2026-June/003702.html

redhat.atlassian.net/browse/PSIRTSUPT-16950

cve.org (CVE-2026-50262)

nvd.nist.gov (CVE-2026-50262)

Download JSON