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Home/Vulnerability/CVE-2026-50263

CVE-2026-50263

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()

Published: Jun 5, 2026Updated: Jun 11, 2026 Sources: CVE List NVD
NVD MITRE
5.5CVSS
MEDIUM

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.

EPSS Score
0.0%
Top 97.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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

Weaknesses

CWE-416

Affected Products

Red Hat Enterprise Linux 10
Red Hat
Operating Systems / linux-distro
Red Hat Enterprise Linux 6
Red Hat
Operating Systems / linux-distro
Red Hat Enterprise Linux 7
Red Hat
Operating Systems / linux-distro
Red Hat Enterprise Linux 8
Red Hat
Operating Systems / linux-distro
Red Hat Enterprise Linux 9
Red Hat
Operating Systems / linux-distro
red hatcommercialUSOperating Systemsaka red hat
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-50263
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2485388
bugzilla.redhat.com
https://gitlab.freedesktop.org/xorg/xserver/-/commit/ecc634f1b2f7aa473d3a267eada98c4918bf9e05
gitlab.freedesktop.org
and 2 more references View all →

Timeline

Published
Jun 5, 2026
Last Updated
Jun 11, 2026
News mentions
1

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