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01 Record

CVE-2022-4283

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

HighPUBLISHEDCNA: redhat
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.07% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 64.8% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-12-14 00:00Z3 YR AGO
Last updated
2025-04-14 18:13Z1 YR AGO
Reserved
2022-12-05
Assigning CNA
redhat
Record state
PUBLISHED
Severity
High (CVSS 7.8)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
Data version
5.1
Document digest
112a78e8599f8597be25b3bb6e75c8595acccd6896931e71161de2967019fb92

05 Affected products

VendorProductVersionsPlatforms
n/axorg-x11-serverxorg-x11-server-1.20.4—

06 References

07 Fixed in

AlmaLinux 8

  • tigervnc
    Fixed in 1.12.0-15.el8_8
  • tigervnc-icons
    Fixed in 1.12.0-15.el8_8
  • tigervnc-license
    Fixed in 1.12.0-15.el8_8
  • tigervnc-selinux
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server-minimal
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server-module
    Fixed in 1.12.0-15.el8_8
  • xorg-x11-server-Xdmx
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xephyr
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xnest
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xorg
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xvfb
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xwayland
    Fixed in 21.1.3-10.el8
  • xorg-x11-server-common
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-devel
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-source
    Fixed in 1.20.11-15.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • tigervnc
    Fixed in 1.12.0-13.el9_2
  • tigervnc-icons
    Fixed in 1.12.0-13.el9_2
  • tigervnc-license
    Fixed in 1.12.0-13.el9_2
  • tigervnc-selinux
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server-minimal
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server-module
    Fixed in 1.12.0-13.el9_2
  • xorg-x11-server-Xdmx
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xephyr
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xnest
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xorg
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xvfb
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xwayland
    Fixed in 21.1.3-7.el9
  • xorg-x11-server-common
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-devel
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-source
    Fixed in 1.20.11-17.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • tigervnc
    Fixed in 1.12.0-15.el8_8
  • tigervnc-icons
    Fixed in 1.12.0-15.el8_8
  • tigervnc-license
    Fixed in 1.12.0-15.el8_8
  • tigervnc-selinux
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server-minimal
    Fixed in 1.12.0-15.el8_8
  • tigervnc-server-module
    Fixed in 1.12.0-15.el8_8
  • xorg-x11-server-Xdmx
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xephyr
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xnest
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xorg
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xvfb
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-Xwayland
    Fixed in 21.1.3-10.el8
  • xorg-x11-server-common
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-devel
    Fixed in 1.20.11-15.el8
  • xorg-x11-server-source
    Fixed in 1.20.11-15.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • tigervnc
    Fixed in 1.12.0-13.el9_2
  • tigervnc-icons
    Fixed in 1.12.0-13.el9_2
  • tigervnc-license
    Fixed in 1.12.0-13.el9_2
  • tigervnc-selinux
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server-minimal
    Fixed in 1.12.0-13.el9_2
  • tigervnc-server-module
    Fixed in 1.12.0-13.el9_2
  • xorg-x11-server-Xdmx
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xephyr
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xnest
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xorg
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xvfb
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-Xwayland
    Fixed in 21.1.3-7.el9
  • xorg-x11-server-common
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-devel
    Fixed in 1.20.11-17.el9
  • xorg-x11-server-source
    Fixed in 1.20.11-17.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • xorg-server
    Fixed in 2:21.1.5-1
  • xwayland
    Fixed in 2:22.1.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • xorg-server
    Fixed in 2:21.1.5-1
  • xwayland
    Fixed in 2:22.1.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • xorg-server
    Fixed in 2:21.1.5-1
  • xwayland
    Fixed in 2:22.1.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • xorg-server
    Fixed in 2:1.19.6-1ubuntu4.13
  • xorg-server-hwe-18.04
    Fixed in 2:1.20.8-2ubuntu2.2~18.04.9

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • xorg-server
    Fixed in 2:1.20.13-1ubuntu1~20.04.5

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • xorg-server
    Fixed in 2:21.1.3-2ubuntu2.5
  • xwayland
    Fixed in 2:22.1.1-1ubuntu0.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • xorg-server
    Fixed in 2:1.15.1-0ubuntu2.11+esm7
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • xorg-server
    Fixed in 2:1.18.4-0ubuntu0.12+esm5
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • xorg-server-hwe-16.04
    Fixed in 2:1.19.6-1ubuntu4.1~16.04.6+esm4
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.