Concurrency Flaw in Xen Hypervisor Management Components
CVE-2026-62426

Currently unrated

Key Information:

Vendor: Xen Project
Status: Xen Project
Vendor: CVE Published:; 28 July 2026

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What is CVE-2026-62426?

A concurrency flaw exists within the management components of the Xen Hypervisor, specifically related to sysctl and platform operations. These operations rely on a system-wide lock that fails to ensure fairness, resulting in potential delays and management inefficiencies. When XSM/Flask is in use, certain locks may be acquired before necessary permission checks have been carried out, raising security concerns. This vulnerability can impact system integrity and operational stability.

Affected Version(s)

Xen consult Xen advisory XSA-499

References

https://xenbits.xenproject.org/xsa/advisory-499.html

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Timeline

Vulnerability published
Jul 28, 2026
Vulnerability Reserved
Jul 14, 2026

Credit

This issue was discovered by Jan Beulich of SUSE.

CVE-2026-62426 Data

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