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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Redhat
  • Enterprise Linux
  • Enterprise Linux Eus
  • Rhel Aus
  • Rhel E4s
  • Rhel Els
  • Rhel Eus
  • Rhel Eus Long Life
  • Rhel Tus
X.org
  • X Server
  • Xorg-server
  • Xwayland

Configuration 1 [-]

OR cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

No data.

References
Link Providers
https://access.redhat.com/errata/RHSA-2026:26562 cve-icon
https://access.redhat.com/errata/RHSA-2026:26566 cve-icon
https://access.redhat.com/errata/RHSA-2026:26590 cve-icon
https://access.redhat.com/errata/RHSA-2026:26610 cve-icon
https://access.redhat.com/errata/RHSA-2026:26709 cve-icon
https://access.redhat.com/errata/RHSA-2026:28923 cve-icon
https://access.redhat.com/errata/RHSA-2026:29844 cve-icon
https://access.redhat.com/errata/RHSA-2026:36083 cve-icon
https://access.redhat.com/errata/RHSA-2026:36085 cve-icon
https://access.redhat.com/errata/RHSA-2026:36086 cve-icon
https://access.redhat.com/errata/RHSA-2026:36087 cve-icon
https://access.redhat.com/errata/RHSA-2026:36632 cve-icon
https://access.redhat.com/errata/RHSA-2026:36633 cve-icon
https://access.redhat.com/errata/RHSA-2026:36634 cve-icon
https://access.redhat.com/errata/RHSA-2026:36768 cve-icon
https://access.redhat.com/errata/RHSA-2026:36791 cve-icon
https://access.redhat.com/errata/RHSA-2026:36792 cve-icon
https://access.redhat.com/errata/RHSA-2026:36798 cve-icon
https://access.redhat.com/errata/RHSA-2026:38502 cve-icon
https://access.redhat.com/errata/RHSA-2026:38810 cve-icon
https://access.redhat.com/security/cve/CVE-2026-50262 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2485387 cve-icon cve-icon
https://gitlab.freedesktop.org/xorg/xserver/-/commit/6d459e4daf715bea8abdafa8fb130be2f8a1d145 cve-icon cve-icon cve-icon
https://lists.x.org/archives/xorg-announce/2026-June/003702.html cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-50262 cve-icon
https://redhat.atlassian.net/browse/PSIRTSUPT-16950 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-50262 cve-icon
History

Mon, 13 Jul 2026 12:00:00 +0000

Type Values Removed Values Added
References

Mon, 13 Jul 2026 05:30:00 +0000

Type Values Removed Values Added
References

Wed, 08 Jul 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat enterprise Linux Eus
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
cpe:/o:redhat:enterprise_linux_eus:10.0
Vendors & Products Redhat enterprise Linux Eus
Redhat rhel Tus
References

Wed, 08 Jul 2026 17:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
References

Wed, 08 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel Eus Long Life
CPEs cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
Vendors & Products Redhat rhel Aus
Redhat rhel Eus Long Life
References

Wed, 08 Jul 2026 10:00:00 +0000

Type Values Removed Values Added
References

Tue, 07 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Els
Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_e4s:9.4::appstream
cpe:/a:redhat:rhel_eus:9.6::appstream
cpe:/a:redhat:rhel_eus:9.6::crb
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
Redhat rhel Eus
References

Tue, 07 Jul 2026 07:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel E4s
CPEs cpe:/a:redhat:rhel_e4s:9.2::appstream
Vendors & Products Redhat rhel E4s
References

Thu, 25 Jun 2026 14:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:9
References

Wed, 24 Jun 2026 11:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:8
References

Mon, 22 Jun 2026 08:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:10.2
References

Thu, 18 Jun 2026 04:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::crb
cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/a:redhat:enterprise_linux:9::crb
References

Wed, 17 Jun 2026 12:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::appstream
References

Mon, 15 Jun 2026 13:45:00 +0000

Type Values Removed Values Added
First Time appeared X.org x Server
X.org xwayland
CPEs cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Vendors & Products X.org x Server
X.org xwayland

Tue, 09 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 07 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared X.org
X.org xorg-server
Vendors & Products X.org
X.org xorg-server

Fri, 05 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 05 Jun 2026 11:45:00 +0000

Type Values Removed Values Added
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.
Title Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-125
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-06-05T10:36:43.916Z

Updated: 2026-07-13T11:04:51.558Z

Reserved: 2026-06-04T14:55:24.012Z

Link: CVE-2026-50262

cve-icon Vulnrichment

Updated: 2026-06-09T13:37:07.388Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-05T12:16:39.770

Modified: 2026-06-15T13:40:21.960

Link: CVE-2026-50262

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-06-02T00:00:00Z

Links: CVE-2026-50262 - Bugzilla