X.org Server xkb.c _GetCountedString buffer overflow
Priority MEDIUM 42CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 11 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
A vulnerability classified as critical was found in X.org Server. Affected by this vulnerability is the function _GetCountedString of the file xkb/xkb.c. The manipulation leads to buffer overflow. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211051.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02034 81st percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 11 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| x.org | Server | all versions | — | No fix listed | CNA |
- Server Vendorx.org Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* | before 21.1.6 | Vulnerable | x.org |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
- cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* Versions before 21.1.6 Vulnerable ·x.org
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
Remediation
Red Hat 5 advisories
- RHSA-2023:2805 Released 2023-05-16 · Red Hat rating Moderatexorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-Xwayland-21.1.3-10.el8
- RHSA-2023:2806 Released 2023-05-16 · Red Hat rating Moderatexorg-x11-server security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) xorg-x11-server-1.20.11-15.el8, xorg-x11-server-Xdmx-1.20.11-15.el8, xorg-x11-server-Xephyr-1.20.11-15.el8 +4
- Red Hat Enterprise Linux CRB (v. 8) xorg-x11-server-devel-1.20.11-15.el8, xorg-x11-server-source-1.20.11-15.el8
- RHSA-2023:2249 Released 2023-05-09 · Red Hat rating Moderatexorg-x11-server-Xwayland security update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-Xwayland-21.1.3-7.el9
Show 2 more Red Hat advisories
- RHSA-2023:2248 Released 2023-05-09 · Red Hat rating Moderatexorg-x11-server security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 9) xorg-x11-server-1.20.11-17.el9, xorg-x11-server-Xdmx-1.20.11-17.el9, xorg-x11-server-Xephyr-1.20.11-17.el9 +4
- Red Hat Enterprise Linux CRB (v. 9) xorg-x11-server-devel-1.20.11-17.el9, xorg-x11-server-source-1.20.11-17.el9
- RHSA-2022:8491 Released 2022-11-16 · Red Hat rating Importantxorg-x11-server security update
- Red Hat Enterprise Linux Client (v. 7) xorg-x11-server-1.20.4-19.el7_9, xorg-x11-server-Xephyr-1.20.4-19.el7_9, xorg-x11-server-Xorg-1.20.4-19.el7_9 +1
- Red Hat Enterprise Linux Client Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-19.el7_9, xorg-x11-server-Xnest-1.20.4-19.el7_9, xorg-x11-server-Xvfb-1.20.4-19.el7_9 +3
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) xorg-x11-server-1.20.4-19.el7_9, xorg-x11-server-Xdmx-1.20.4-19.el7_9, xorg-x11-server-Xephyr-1.20.4-19.el7_9 +7
- Red Hat Enterprise Linux Server (v. 7) xorg-x11-server-1.20.4-19.el7_9, xorg-x11-server-Xephyr-1.20.4-19.el7_9, xorg-x11-server-Xorg-1.20.4-19.el7_9 +1
- Red Hat Enterprise Linux Server Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-19.el7_9, xorg-x11-server-Xnest-1.20.4-19.el7_9, xorg-x11-server-Xvfb-1.20.4-19.el7_9 +4
- Red Hat Enterprise Linux Workstation (v. 7) xorg-x11-server-1.20.4-19.el7_9, xorg-x11-server-Xephyr-1.20.4-19.el7_9, xorg-x11-server-Xorg-1.20.4-19.el7_9 +1
- Red Hat Enterprise Linux Workstation Optional (v. 7) xorg-x11-server-Xdmx-1.20.4-19.el7_9, xorg-x11-server-Xnest-1.20.4-19.el7_9, xorg-x11-server-Xvfb-1.20.4-19.el7_9 +3
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
X.org Server — FEDORA-2022-9100b7aafd
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-03270 X.org Server xkb.c ProcXkbGetKbdByName memory leakPriority LOW 33
- Advisory ·
X.org Server — FEDORA-2022-5495b36bed
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-03270 X.org Server xkb.c ProcXkbGetKbdByName memory leakPriority LOW 33
Show 3 more groups
- Advisory ·
X.org Server — FEDORA-2022-64ad80875c
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-03270 X.org Server xkb.c ProcXkbGetKbdByName memory leakPriority LOW 33
- Advisory ·
X.org Server — FEDORA-2022-613e993500
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-03270 X.org Server xkb.c ProcXkbGetKbdByName memory leakPriority LOW 33
- Advisory ·
X.org Server — DSA-5278
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2022-03270 X.org Server xkb.c ProcXkbGetKbdByName memory leakPriority LOW 33
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:2805, RHSA-2023:2806 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:2248, RHSA-2023:2249 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2023:2806 |
| Red Hat Enterprise Linux CRB (v. 9) | Fixed | RHSA-2023:2248 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2022:8491 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2022:8491 |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-3550
- 2026-10-03 Alias added: GHSA-h54w-qqq6-jp69
References
Patch 1
More x.org X Server vulnerabilities
- TI-2018-10528 A flaw was found in xorg-x11-server before 1.20.3. CVSS 3.0MEDIUM 6.6
- TI-2017-08976 Improper input validation in x.org xorg-x11-server CVSS 3.0CRITICAL 9.8
- TI-2017-08975 xorg-x11-server before 1.19.5 was missing length validation in MIT-SCREEN-SAVER extension… CVSS 3.0CRITICAL 9.8
- TI-2017-08974 Improper input validation in x.org xorg-x11-server CVSS 3.0CRITICAL 9.8
- TI-2017-08973 Improper input validation in x.org xorg-x11-server CVSS 3.0CRITICAL 9.8
- TI-2017-08972 Improper input validation in x.org xorg-x11-server CVSS 3.0CRITICAL 9.8
Sources
- CVE-2022-3550 · CVE Program
- CVE-2022-3550 · NVD
- FIRST EPSS
- GHSA-h54w-qqq6-jp69 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-3550 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences