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CVE-2026-88071

HighCVSS 7.8/10Last modified Oct 16, 2026

Description

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

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Windows 11 version 23H2	>= 10.0.22631.0, < 10.0.22631.7652
Microsoft	Windows 11 Version 23H2	>= 10.0.22631.0, < 10.0.22631.7652
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.9711
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.9711
Microsoft	Windows 11 Version 26H2	>= 10.0.26300.0, < 10.0.26300.9711
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5761
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.33650
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.33650

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88071Patch, Vendor Advisory

Timeline

Published: Oct 13, 2026
Last modified: Oct 16, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-880727.8Improper access control in Windows Host Guardian Service allows an authorized attacker to elevate privileges locally.CVE-2026-880737.8Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.CVE-2026-880747.8Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges lo CVE-2026-880758.8Improper neutralization of special elements used in an sql command ('sql injection') in Microsoft Configuration Manager allows an authorized CVE-2026-880767.0Null pointer dereference in Windows Installer allows an authorized attacker to elevate privileges locally.CVE-2026-880778.8Integer overflow or wraparound in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.CVE-2026-880784.3Improper verification of cryptographic signature in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over CVE-2026-880797.0Null pointer dereference in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.CVE-2026-880807.8Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.CVE-2026-880817.7Out-of-bounds read in SQL Server allows an authorized attacker to disclose information over a network.CVE-2026-880827.0Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges locally.CVE-2026-880837.5Stack-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.

CVE-2026-88071: High severity, CVSS 7.8 | Vulnix