CVE-2025-27464: WinPVDrivers: Excessive permissions on user-exposed devices

Published May 27, 2025

Updated

[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 Software

3 affected components

Xen Project XenCons=

Xen Project XenIface=

Xen Project XenBus=

Event History

Jul 9, 2026

CVE Published

via MITRE·02:35 PM

Data Sourced

via MITRE·02:35 PM

DescriptionWeakness

Data Sourced

via NVD·04:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2025-27464?

CVE-2025-27464 is classified as a high severity vulnerability due to excessive permissions that can expose user devices.

How do I fix CVE-2025-27464?

To fix CVE-2025-27464, update the XEN WinPVDrivers to the latest version that addresses this vulnerability.

What are the potential impacts of CVE-2025-27464?

The potential impacts of CVE-2025-27464 include unauthorized access to sensitive user-exposed devices.

Who is affected by CVE-2025-27464?

CVE-2025-27464 affects users running the XEN WinPVDrivers with excessive permissions granted to user-exposed devices.

When was CVE-2025-27464 published?

CVE-2025-27464 was published on May 27, 2025.