CVE-2026-50263
MEDIUMXorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Title source: cnaDescription
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.
References (5)
Core 5
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-50263
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2485388
https://bugzilla.redhat.com/show_bug.cgi?id=2485388
Scores
CVSS v3
5.5
EPSS
0.0018
EPSS Percentile
7.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-416
Status
published
Products (11)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
redhat/enterprise_linux
7.0
redhat/enterprise_linux
8.0
redhat/enterprise_linux
9.0
redhat/enterprise_linux
10.0
x.org/x_server
< 21.1.23
... and 1 more
Published
Jun 05, 2026
Tracked Since
Jun 05, 2026