Quick answers
- Is CVE-2025-27463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-27463 being exploited in the wild.
- How severe is CVE-2025-27463?
- Informational severity, with a CVSS score of 9.4, published 9 July 2026.
- Which products and versions are affected?
- Xen Project Windows PV drivers All versions.
- Is there a fix for CVE-2025-27463?
- A patch was published on 2025-05-27: Patches released for xenbus, xencons, and xeniface Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2025-27463 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2025-27463?
- Check whether you run Xen Project Windows PV drivers at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The XenIface component within the Xen Project Windows PV drivers fails to implement security descriptors for certain facilities exposed to userspace. This results in incorrect default permissions (CWE-276), making these interfaces fully accessible to unprivileged users. An attacker with local access to a Windows guest VM can exploit this lack of access control to perform unauthorized operations, leading to a local privilege escalation (LPE) from a standard user to the guest kernel. The vulnerability affects all releases of the xeniface driver. Patches are available from the Xen Project, and a PowerShell mitigation script has been provided to apply security descriptors to existing registry and device objects.
Affected products
- Xen Project Windows PV drivers All versions
Timeline
- 2025-05-27: disclosed: Initial public release of XSA-468
- 2025-05-27: patched: Patches released for xenbus, xencons, and xeniface
- 2026-07-09: advisory: NVD publication date