Description
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
Published: 2026-05-12
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 15 May 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*

Wed, 13 May 2026 10:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 13 May 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows 11 22h3
Microsoft windows 11 23h2
Vendors & Products Microsoft windows 11 22h3
Microsoft windows 11 23h2

Tue, 12 May 2026 17:30:00 +0000

Type Values Removed Values Added
Description Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
Title Windows Hyper-V Elevation of Privilege Vulnerability
First Time appeared Microsoft
Microsoft windows 11 23h2
Microsoft windows Server 2022
Weaknesses CWE-416
CPEs cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 11 23h2
Microsoft windows Server 2022
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Windows 11 22h3 Windows 11 23h2 Windows 11 23h2 Windows Server 2022
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-05-15T17:13:24.465Z

Reserved: 2026-04-13T00:27:50.798Z

Link: CVE-2026-40402

cve-icon Vulnrichment

Updated: 2026-05-13T09:58:33.094Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-12T18:17:18.000

Modified: 2026-05-15T15:23:40.807

Link: CVE-2026-40402

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T10:00:10Z

Weaknesses