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        "cveId": "CVE-2025-27464",
        "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "state": "PUBLISHED",
        "assignerShortName": "XEN",
        "dateReserved": "2025-02-26T09:16:54.461Z",
        "datePublished": "2026-07-09T14:35:38.440Z",
        "dateUpdated": "2026-07-09T16:07:40.763Z"
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            "title": "WinPVDrivers: Excessive permissions on user-exposed devices",
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                            "lang": "en",
                            "cweId": "CWE-276",
                            "description": "CWE-276 Incorrect default permissions",
                            "type": "CWE"
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            "impacts": [
                {
                    "capecId": "CAPEC-233",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-233 Privilege Escalation"
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                    "vendor": "Xen",
                    "product": "Windows PV drivers",
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                            "status": "affected",
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                {
                    "lang": "en",
                    "value": "[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",
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                {
                    "url": "https://xenbits.xen.org/xsa/advisory-468.html"
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                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
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                        "subAvailabilityImpact": "HIGH",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "CRITICAL",
                        "baseScore": 9.4,
                        "vectorString": "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"
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                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "This issue was discovered by Tu Dinh of Vates",
                    "type": "finder"
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            "source": {
                "discovery": "UNKNOWN"
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