CVE-2023-0494
HIGHX.Org X Server < 21.1.7 - Use-After-Free in DeepCopyPointerClasses
Title source: llmDescription
A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.
References (4)
Core 4
Core References
Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2165995
Mailing List, Vendor Advisory
https://lists.x.org/archives/xorg-announce/2023-February/003320.html
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202305-30
Scores
CVSS v3
7.8
EPSS
0.0071
EPSS Percentile
72.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (35)
fedoraproject/fedora
36
fedoraproject/fedora
37
redhat/enterprise_linux
8.0
redhat/enterprise_linux
8.1
redhat/enterprise_linux
9.0
redhat/enterprise_linux_aus
8.4
redhat/enterprise_linux_aus
8.6
redhat/enterprise_linux_desktop
7.0
redhat/enterprise_linux_eus
8.4
redhat/enterprise_linux_eus
8.6
... and 25 more
Published
Mar 27, 2023
Tracked Since
Feb 18, 2026