CVE-2026-56000
7.8 · HIGHOverview
CVE-2026-56000 is a high-severity vulnerability affecting x.org x_server. It was published on July 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
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, < 21.2.24 | Affected |
| x.org | xwayland | >= 0, < 24.1.13 | Affected |
Frequently Asked Questions
What is CVE-2026-56000?
CVE-2026-56000 is a high-severity vulnerability affecting x.org x_server. It was published on July 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2026-56000?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-56000?
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-2026-56000?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-56000 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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