CVE-2023-1393

xorg-x11-server: X.Org Server Overlay Window Use-After-Free Local Privilege Escalation Vulnerability

Published Mar 30, 2023 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3372-1 xorg-server security update
Debian DSA Debian DSA DSA-5380-1 xorg-server security update
EUVD EUVD EUVD-2023-23649 A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.
Ubuntu USN Ubuntu USN USN-5986-1 X.Org X Server vulnerability
History
Type Values Removed Values Added
First Time appeared X.org x Server
CPEs cpe:2.3:a:x.org:xorg-server:*:*:*:*:*:*:*:* cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:*
Vendors & Products X.org xorg-server
X.org x Server
Type Values Removed Values Added
Metrics ssvc

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Jan 22, 2026, 4:55 AM
Reserved
Mar 14, 2023, 12:00 AM
Status
Modified
Published
Mar 30, 2023, 9:15 PM
Modified
Jun 17, 2026, 5:27 AM
Severity
Important
Public date
Mar 29, 2023, 12:00 AM