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CVE-2025-27463WinPVDrivers: Excessive permissions on user-exposed devices

[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

9.4 CRITICALEPSS 0.15%Not in KEVNVD: Deferred

OverviewAffected ProductsReferences
NVD CVE.org

Overview

Severity

ScoreSeverityVersionVector String
9.4CRITICAL4.0XEN (CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Details

CVE ID
CVE-2025-27463
Status
Deferred
Assigner (CNA)
XEN
Published
Jul 9, 2026
Last modified
2026-09-29 19:10 UTC
Weaknesses
  • CWE-276 · Incorrect default permissions

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 07:31 UTC.