CVE-2022-4283
HIGHX.Org X Server - Use-After-Free in XkbCopyNames via XkbGetKbdByName Request
Title source: llmDescription
A vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests.. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions.
References (7)
Core 7
Core References
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2022-4283
Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2151761
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXDF2O5PPLE3SVAJJYUOSAD5QZ4TWQ2G/
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5NELB7YDWRABYYBG4UPTHRBDTKJRV5M2/
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5304
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z67QC4C3I2FI2WRFIUPEHKC36J362MLA/
Third Party Advisory
https://security.gentoo.org/glsa/202305-30
Scores
CVSS v3
7.8
EPSS
0.0020
EPSS Percentile
41.8%
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 (8)
debian/debian_linux
11.0
fedoraproject/fedora
36
fedoraproject/fedora
37
redhat/enterprise_linux
6.0
redhat/enterprise_linux
7.0
redhat/enterprise_linux
8.0
redhat/enterprise_linux
9.0
x.org/x_server
1.20.4
Published
Dec 14, 2022
Tracked Since
Feb 18, 2026