CVE-2026-88071

HIGH CVSS 3.1: 7.8 EPSS 0.31%
Updated Oct 16, 2026
Microsoft
Parameter Value
CVSS 7.8 (HIGH)
Affected Versions before 10.0.26300.9711
Fixed In 10.0.22631.7652
Type CWE-415 (Double Free)
Vendor Microsoft
Public PoC No

Double free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 10

Configuration From (including) Up to (excluding)
Microsoft Windows_11_23h2
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
— 10.0.22631.7652
Microsoft Windows_11_23h2
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
— 10.0.22631.7652
Microsoft Windows_11_24h2
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
— 10.0.26100.9711
Microsoft Windows_11_24h2
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
— 10.0.26100.9711
Microsoft Windows_11_25h2
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
— 10.0.26200.9711
Microsoft Windows_11_25h2
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
— 10.0.26200.9711
Microsoft Windows_11_26h2
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:*
— 10.0.26300.9711
Microsoft Windows_11_26h2
cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:*
— 10.0.26300.9711
Microsoft Windows_Server_2022
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*
— 10.0.20348.5761
Microsoft Windows_Server_2025
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*
— 10.0.26100.33650