CVE-2025-27463: 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·02:29 PM

Data Sourced

via MITRE·02:29 PM

DescriptionWeakness

Data Sourced

via NVD·04:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2025-27463?

CVE-2025-27463 is classified as a medium severity vulnerability due to excessive permissions on user-exposed devices.

How do I fix CVE-2025-27463?

To mitigate CVE-2025-27463, update to the latest version of the XEN WinPVDrivers that addresses the excessive permissions.

Which devices are affected by CVE-2025-27463?

CVE-2025-27463 affects user-exposed devices managed by the XEN WinPVDrivers.

What are the potential impacts of CVE-2025-27463?

CVE-2025-27463 could allow unauthorized access to devices, leading to unauthorized data access or manipulation.

Who is affected by CVE-2025-27463?

Users and administrators of the XEN WinPVDrivers software running environments with exposed devices may be affected by CVE-2025-27463.