CVE-2023-1393

HIGH7.8EPSS 0.09%

xorg-server - security update

Published: 3/30/2023Modified: 3/9/2026

Also known as:DSA-5380-1DEBIAN-CVE-2023-1393

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.

Affected packages (4)

Debian/xorg-serverfrom 0, < 2:1.20.11-1+deb11u6
Debian/xorg-serverfrom 0, < 2:1.20.4-1+deb10u9
Debian/xorg-serverfrom 0, < 2:1.20.11-1+deb11u6
Debian/xwaylandfrom 0, < 2:22.1.9-1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References (1)

ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2023-1393