Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | xorg-x11-server | xorg-server 21.1.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xorg-server | 2:21.1.7-1 | — |
| Debian 14 | xwayland | 2:22.1.8-1 | — |
| Debian 13 | xorg-server | 2:21.1.7-1 | — |
| Debian 13 | xwayland | 2:22.1.8-1 | — |
| Debian 12 | xorg-server | 2:21.1.7-1 | — |
| Debian 12 | xwayland | 2:22.1.8-1 | — |
| Debian 11 | xorg-server | 2:1.20.11-1+deb11u5 | DSA-5342-1 |
| Debian 10 | xorg-server | 2:1.20.4-1+deb10u8 | DLA-3310-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | xorg-server | 2:21.1.3-2ubuntu2.7 | USN-5846-1 |
| Ubuntu 22.04 LTS | xwayland | 2:22.1.1-1ubuntu0.5 | USN-5846-1 |
| Ubuntu 20.04 LTS | xorg-server | 2:1.20.13-1ubuntu1~20.04.6 | USN-5846-1 |
| Ubuntu 18.04 LTS | xorg-server | 2:1.19.6-1ubuntu4.14 | USN-5846-1 |
| Ubuntu 18.04 LTS | xorg-server-hwe-18.04 | 2:1.20.8-2ubuntu2.2~18.04.10 | USN-5846-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | xorg-server | 2:1.18.4-0ubuntu0.12+esm5 | USN-5778-2 |
| Ubuntu Pro 16.04 LTS | xorg-server-hwe-16.04 | 2:1.19.6-1ubuntu4.1~16.04.6+esm4 | USN-5778-2 |
| Ubuntu Pro 14.04 LTS | xorg-server | 2:1.15.1-0ubuntu2.11+esm7 | USN-5778-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | tigervnc +6 | 1.12.0-5.el9_1.1 | RHSA-2023:0622 |
| RHEL 9 | xorg-x11-server +8 | 1.20.11-17.el9 | RHSA-2023:2248 |
| RHEL 9 | xorg-x11-server-Xwayland | 21.1.3-7.el9 | RHSA-2023:2249 |
| RHEL 8 | tigervnc +6 | 1.12.0-9.el8_7.1 | RHSA-2023:0662 |
| RHEL 8 | xorg-x11-server +8 | 1.20.11-15.el8 | RHSA-2023:2806 |
| RHEL 8 | xorg-x11-server-Xwayland | 21.1.3-10.el8 | RHSA-2023:2805 |
| RHEL 7 | tigervnc +6 | 1.8.0-24.el7_9 | RHSA-2023:0675 |
| RHEL 7 | xorg-x11-server +9 | 1.20.4-22.el7_9 | RHSA-2023:0675 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | tigervnc +6 | 1.11.0-22.el9_0.1 | RHSA-2023:0623 |
| RHEL 8.6 EUS | tigervnc +6 | 1.12.0-6.el8_6.1 | RHSA-2023:0663 |
| RHEL 8.4 EUS | tigervnc +6 | 1.11.0-8.el8_4.1 | RHSA-2023:0664 |
| RHEL 8.2 TUS | tigervnc +6 | 1.9.0-15.el8_2.1 | RHSA-2023:0671 |
| RHEL 8.2 E4S | tigervnc +6 | 1.9.0-15.el8_2.1 | RHSA-2023:0671 |
| RHEL 8.2 AUS | tigervnc +6 | 1.9.0-15.el8_2.1 | RHSA-2023:0671 |
| RHEL 8.1 E4S | tigervnc +6 | 1.9.0-16.el8_1.1 | RHSA-2023:0665 |
| RHEL 6 ELS | tigervnc +3 | 1.1.0-25.el6_10.13 | RHSA-2025:12751 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | tigervnc +6 | 1.12.0-5.el9_1.1 | ALSA-2023:0622 |
| AlmaLinux 9 | xorg-x11-server-Xdmx +7 | 1.20.11-17.el9 | ALSA-2023:2248 |
| AlmaLinux 9 | xorg-x11-server-Xwayland | 21.1.3-7.el9 | ALSA-2023:2249 |
| AlmaLinux 8 | tigervnc +6 | 1.12.0-9.el8_7.1 | ALSA-2023:0662 |
| AlmaLinux 8 | xorg-x11-server-Xdmx +7 | 1.20.11-15.el8 | ALSA-2023:2806 |
| AlmaLinux 8 | xorg-x11-server-Xwayland | 21.1.3-10.el8 | ALSA-2023:2805 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | tigervnc | 1.12.0-5.el9_1.1 | RLSA-2023:0622 |
| Rocky Linux 8 | tigervnc | 1.12.0-9.el8_7.1 | RLSA-2023:0662 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0288-1, SUSE-SU-2023:0285-1 |
| SLES 15 SP4 | xwayland | 21.1.4-150400.3.9.1 | SUSE-SU-2023:0289-1 |
| SLES 15 SP3 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLES 15 SP2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLES 15 SP1 | xorg-x11-server | 1.20.3-150100.14.5.36.1 | SUSE-SU-2023:0287-1 |
| SLES 12 SP5 | xorg-x11-server | 1.19.6-10.43.1 | SUSE-SU-2023:0286-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | xorg-x11-server | 1.19.6-4.42.1 | SUSE-SU-2023:0282-1 |
| SLES 12 SP2 | xorg-x11-server | 7.6_1.18.3-76.60.1 | SUSE-SU-2023:0284-1 |
| SLES for SAP 15 SP3 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLES for SAP 15 SP2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLES for SAP 15 SP1 | xorg-x11-server | 1.20.3-150100.14.5.36.1 | SUSE-SU-2023:0287-1 |
| SLES for SAP 12 SP5 | xorg-x11-server | 1.19.6-10.43.1 | SUSE-SU-2023:0286-1 |
| SLES for SAP 12 SP4 | xorg-x11-server | 1.19.6-4.42.1 | SUSE-SU-2023:0282-1 |
| SLE Real Time 15 SP3 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLE HPC 15 SP3 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLE HPC 15 SP2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SLE HPC 15 SP1 | xorg-x11-server | 1.20.3-150100.14.5.36.1 | SUSE-SU-2023:0287-1 |
| SUSE OpenStack Cloud Crowbar 9 | xorg-x11-server | 1.19.6-4.42.1 | SUSE-SU-2023:0282-1 |
| SUSE OpenStack Cloud 9 | xorg-x11-server | 1.19.6-4.42.1 | SUSE-SU-2023:0282-1 |
| SUSE Manager Server 4.2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SUSE Manager Retail Branch Server 4.2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SUSE Manager Proxy 4.2 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SUSE Enterprise Storage 7.1 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
| SUSE Enterprise Storage 7 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0285-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xorg-x11-server | 21.1.7-1.1 | openSUSE-SU-2024:12664-1 |
| openSUSE Tumbleweed | xwayland | 22.1.8-1.1 | openSUSE-SU-2024:12665-1 |
| openSUSE Leap 15.4 | xorg-x11-server | 1.20.3-150200.22.5.66.1 | SUSE-SU-2023:0288-1, SUSE-SU-2023:0285-1 |
| openSUSE Leap 15.4 | xwayland | 21.1.4-150400.3.9.1 | SUSE-SU-2023:0289-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.24 | xwayland | 22.1.8-r0 | — |
| Alpine v3.23 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.23 | xwayland | 22.1.8-r0 | — |
| Alpine v3.22 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.22 | xwayland | 22.1.8-r0 | — |
| Alpine v3.21 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.21 | xwayland | 22.1.8-r0 | — |
| Alpine v3.20 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.20 | xwayland | 22.1.8-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.19 | xwayland | 22.1.8-r0 | — |
| Alpine v3.18 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.18 | xwayland | 22.1.8-r0 | — |
| Alpine v3.17 | xorg-server | 21.1.7-r0 | — |
| Alpine v3.17 | xwayland | 22.1.8-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | xorg-x11-server-Xdmx +7 | 1.20.14-18.amzn2023.0.1 | ALAS2023-2023-131 |
| Amazon Linux 2 | tigervnc +6 | 1.8.0-24.amzn2.0.2 | ALAS2-2024-2558 |
| Amazon Linux 2 | xorg-x11-server-Xdmx +8 | 1.20.4-22.amzn2 | ALAS2-2023-1982 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | tigervnc +6 | 1.12.0-5.el9_1.1 | ELSA-2023-0622 |
| Oracle Linux 9 | xorg-x11-server-Xdmx +7 | 1.20.11-17.el9 | ELSA-2023-2248 |
| Oracle Linux 9 | xorg-x11-server-Xwayland | 21.1.3-7.el9 | ELSA-2023-2249 |
| Oracle Linux 8 | tigervnc +6 | 1.12.0-9.el8_7.1 | ELSA-2023-0662 |
| Oracle Linux 8 | xorg-x11-server-Xdmx +7 | 1.20.11-15.el8 | ELSA-2023-2806 |
| Oracle Linux 8 | xorg-x11-server-Xwayland | 21.1.3-10.el8 | ELSA-2023-2805 |
| Oracle Linux 7 | tigervnc +6 | 1.8.0-24.el7_9 | ELSA-2023-0675 |
| Oracle Linux 7 | xorg-x11-server-Xdmx +8 | 1.20.4-22.el7_9 | ELSA-2023-0675 |
Advisories 48
- ALSA-2023:0622 Important: tigervnc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2249 Moderate: xorg-x11-server-Xwayland security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2248 Moderate: xorg-x11-server security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2805 Moderate: xorg-x11-server-Xwayland security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2806 Moderate: xorg-x11-server security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:0662 Important: tigervnc security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-2031 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2025:12751 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-5778-2 xorg-server, xorg-server-hwe-16.04 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2023:2806 Red Hat Security Advisory: xorg-x11-server security and bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2023:2805 Red Hat Security Advisory: xorg-x11-server-Xwayland security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2023:2248 Red Hat Security Advisory: xorg-x11-server security and bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2023:2249 Red Hat Security Advisory: xorg-x11-server-Xwayland security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2023:0675 Red Hat Security Advisory: tigervnc and xorg-x11-server security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5846-1 xorg-server, xorg-server-hwe-18.04, xwayland vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- RHSA-2023:0671 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0664 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0665 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0662 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0663 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0623 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- RHSA-2023:0622 Red Hat Security Advisory: tigervnc security update Red Hat Security Advisories (RHSA) · Mar 21, 2026
- DSA-5342-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3310-1 xorg-server - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:0622 Important: tigervnc security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:0662 Important: tigervnc security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2023:0285-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0284-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0282-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0287-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0288-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12664-1 xorg-x11-server-21.1.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0289-1 Security update for xwayland SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0286-1 Security update for xorg-x11-server SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0293 X.Org X11: Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Aug 4, 2025
- openSUSE-SU-2024:12665-1 xwayland-22.1.8-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2024-2558 Important: tigervnc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 29, 2024
- ALAS2-2023-1982 Important: xorg-x11-server security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 23, 2024
- ICSA-24-046-11 Siemens SCALANCE XCM-/XRM-300 CISA ICS & IT advisories · Feb 13, 2024
- SSA-806742 SSA-806742: Multiple Vulnerabilities in SCALANCE XCM-/XRM-300 before V2.4 Siemens ProductCERT · Feb 13, 2024
- ELSA-2023-2806 Moderate: xorg-x11-server security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 24, 2023
- ELSA-2023-2805 Moderate: xorg-x11-server-Xwayland security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 24, 2023
- ELSA-2023-2249 Moderate: xorg-x11-server-Xwayland security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 15, 2023
- ELSA-2023-2248 Moderate: xorg-x11-server security and bug fix update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 15, 2023
- ALAS2023-2023-131 Important: xorg-x11-server security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 14, 2023
- ELSA-2023-0675 Important: tigervnc and xorg-x11-server security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 9, 2023
- ELSA-2023-0622 Important: tigervnc security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 8, 2023
- ELSA-2023-0662 Important: tigervnc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 8, 2023