by Kastro
Paper/Archive/CVE-2025-27462

CVE-2025-27462

Xen Windows PV drivers — WinPVDrivers: Excessive permissions on user-exposed devices

EPSS 0.2%CVSS 9.4
critical.is priorityof 100
29
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 5.0.050 × 201.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

[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

ProductAffectedFixed inSource
Windows PV driversall–CNA

Scores by source

XEN (CNA)9.4CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refxenbits.xen.org/xsa/advisory-468.html