Potential Flaw in Hypervisor from Xen Project Affecting Resource Management
CVE-2026-79608

9.8CRITICAL

Key Information:

Vendor

Xen Project
Status
Xen Project
Vendor
CVE Published:
13 October 2026

What is CVE-2026-79608?

A flaw in the workaround for an earlier security issue has resulted in an inverted conditional logic within the Xen hypervisor. This error may allow the workaround to not be applied when necessary, leading to potential inconsistencies in resource management. The issue stems from a reworked integration that failed to maintain the intended security measures. Users are advised to review the advisory for further details on the implications and recommended actions.

Affected Version(s)

Xen consult Xen advisory XSA-515

References

https://xenbits.xenproject.org/xsa/advisory-515.html

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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 Sashiko + Opus 5.0 and diagnosed as a security issue by George Dunlap.
.