CVE-2025-27464: Xen Windows Pv Drivers

Critical severity, CVSS 9.4. EPSS: 0.2% chance of exploitation in the next 30 days.

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The Windows PV drivers expose various facilities to userspace. Several of these have no security descriptor, and are therefore fully accessible to unprivileged users. These are: 1. XenCons, CVE-2025-27462 2. XenIface, CVE-2025-27463 3. XenBus, CVE-2025-27464

Affected products

• Xen Windows Pv Drivers: any version

Published 2026-07-09. Last modified 2026-09-29.