CVE-2026-88071: Windows Hyper-V Elevation of Privilege Vulnerability
Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
Other sources
Windows Hyper-V Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Can this be exploited remotely or without a user account?
No. The vulnerability has local attack vector and requires low privileges, so an attacker must already have authorized local access. No user interaction is required.
What is the likely impact after successful exploitation?
A successful exploit allows local privilege elevation. The CVSS vector indicates high impact to confidentiality, integrity, and availability.
Which platforms are identified as affected?
The listed software includes Microsoft Windows 11, Microsoft Windows Server 2025, and Microsoft Windows Server 2022. The provided data does not identify specific builds, editions, or Hyper-V configuration conditions.