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CVE-2026-50262

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

Published: Jun 5, 2026Updated: Jul 27, 2026 Sources: CVE List NVD BDUCWE-125
5.5MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 96.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-125

Affected Products

Red Hat Inc.
commercial·USaka redhat, Red Hat
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10.0 Extended Update SupportOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7 Extended Lifecycle SupportOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceOn-premOS
Operating Systems / linux-distro
x.org
oss-project·US
x serverOn-prem
Operating Systems / unix-bsd
xwaylandOn-prem
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
XWaylandOn-prem
Operating Systems / linux-distro
X.Org Foundation
oss-project·USaka xorg-server, libx11, xlib
X.Org Server
Operating Systems / unix-bsd
and 9 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:26562
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:26566
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:26590
access.redhat.com
and 33 more references View all →
News mentions
1

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