Xenstore Vulnerability in XEN_DOMCTL_get_domain_state Management for Xen Hypervisor
CVE-2026-42492

7.5HIGH

Key Information:

Vendor

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

What is CVE-2026-42492?

The vulnerability in Xenstore relates to the management of domain state information through the XEN_DOMCTL_get_domain_state operation. When the system tries to capture the current status of domains, an error in handling the bitmap can occur, specifically when triggered by unprivileged domains. This condition may lead to a scenario where the bitmap, which is supposed to represent the active states, is improperly managed. As a result, it could impact system reliability and security, potentially allowing unauthorized access or control.

Affected Version(s)

Xen consult Xen advisory XSA-496

References

https://xenbits.xenproject.org/xsa/advisory-496.html

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Grygorii Strashko of EPAM.
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