CVE-2023-6816
9.8 · CRITICALOverview
CVE-2023-6816 is a critical-severity vulnerability affecting x.org x_server. It was published on January 18, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.
Remediation
Check the references section for vendor advisories and patches from x.org. Update x_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| x.org | x_server | >= 0, < 21.1.11 | Affected |
| x.org | xwayland | >= 0, < 23.2.4 | Affected |
References
Frequently Asked Questions
What is CVE-2023-6816?
CVE-2023-6816 is a critical-severity vulnerability affecting x.org x_server. It was published on January 18, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2023-6816?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-6816?
Check the references section for vendor advisories and patches from x.org. Update x_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-6816?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-6816 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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