CVE-2026-88071

Analyzed Analyzed - Analysis Complete

Double Free in Windows Hyper-V Elevates Privileges

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-88071

EUVD

EUVD-2026-99647

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-415	The product calls free() twice on the same memory address.

Attack-Flow Graph

Executive Summary

This vulnerability is a double free issue in Windows Hyper-V. A double free occurs when a program frees the same memory twice, which can lead to memory corruption. In this case, an authorized attacker could exploit this to elevate their privileges locally on an affected system.

Detection Guidance

Detection of CVE-2026-88071 requires checking for Hyper-V related double free vulnerabilities in Windows systems. Use Windows Update to ensure the latest security patches are applied. Monitor system logs for Hyper-V crashes or unexpected privilege escalations. No specific commands are provided in the available resources.

Impact Analysis

If exploited, this vulnerability could allow an attacker with local access to gain higher privileges on your system. This might let them install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation in Windows Hyper-V, which could enable unauthorized access to sensitive data or systems. Such access may violate compliance requirements under GDPR (data protection) and HIPAA (health information security) by exposing personal or protected health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Hyper-V double free vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

Hi! I’m here to help you understand CVE-2026-88071. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70