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CVE Vulnerability Details :
CVE-2026-50263
PUBLISHED
More InfoOfficial Page
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
View Known Exploited Vulnerability (KEV) details
Published At-05 Jun, 2026 | 10:36
Updated At-08 Jun, 2026 | 16:01
Rejected At-
▼CVE Numbering Authority (CNA)
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()

A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.

Affected Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 10
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server-Xwayland
CPEs
  • cpe:/o:redhat:enterprise_linux:10
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 6
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server
CPEs
  • cpe:/o:redhat:enterprise_linux:6
Default Status
unknown
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 7
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server
CPEs
  • cpe:/o:redhat:enterprise_linux:7
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server
CPEs
  • cpe:/o:redhat:enterprise_linux:8
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 8
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server-Xwayland
CPEs
  • cpe:/o:redhat:enterprise_linux:8
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server
CPEs
  • cpe:/o:redhat:enterprise_linux:9
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Enterprise Linux 9
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
xorg-x11-server-Xwayland
CPEs
  • cpe:/o:redhat:enterprise_linux:9
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-416Use After Free
Type: CWE
CWE ID: CWE-416
Description: Use After Free
Metrics
VersionBase scoreBase severityVector
3.15.5MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Metrics Other Info
Red Hat severity rating
value:
Moderate
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Timeline
EventDate
Reported to Red Hat.2026-05-15 03:14:46
Made public.2026-06-02 00:00:00
Event: Reported to Red Hat.
Date: 2026-05-15 03:14:46
Event: Made public.
Date: 2026-06-02 00:00:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/security/cve/CVE-2026-50263
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485388
issue-tracking
x_refsource_REDHAT
https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05
N/A
https://lists.x.org/archives/xorg-announce/2026-June/003702.html
N/A
https://redhat.atlassian.net/browse/PSIRTSUPT-16950
N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-50263
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2485388
Resource:
issue-tracking
x_refsource_REDHAT
Hyperlink: https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05
Resource: N/A
Hyperlink: https://lists.x.org/archives/xorg-announce/2026-June/003702.html
Resource: N/A
Hyperlink: https://redhat.atlassian.net/browse/PSIRTSUPT-16950
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found