What’s Vulnerable › Vulnerabilities

CVE-2025-27462: WinPVDrivers: Excessive permissions on user-exposed devices

• Severity: critical (CVSS 9.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-09-29
• Weakness: CWE-276

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

Affected products

• Xen Windows PV drivers: all versions

References

• https://xenbits.xen.org/xsa/advisory-468.html

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