CVE-2025-27463
Critical
Description
[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
SeverityCritical
CVSS9.4
Exploit probability—
ProductWindows PV drivers
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-276CWE-276
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Xen Windows PV drivers | No range specified | — |
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