Quick answers
- Is CVE-2025-27464 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-27464 being exploited in the wild.
- How severe is CVE-2025-27464?
- 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-2025-27464?
- 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-2025-27464 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2025-27464?
- 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 XenBus driver in the Xen Project Windows PV driver suite fails to apply security descriptors to various facilities exposed to userspace. This lack of access control (CWE-276) means these interfaces are fully accessible to unprivileged local users. An attacker with local access to a Windows guest VM can exploit these unprotected interfaces to achieve a privilege escalation from a standard user to the guest kernel. The vulnerability affects all versions of the XenBus driver. Patches have been released by the Xen Project to apply the necessary security descriptors.
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