CVE-2026-96864
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Double Free in Microsoft Failover Cluster Virtual Driver

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Microsoft Corporation

Description
Double free in Microsoft Failover Cluster Virtual Driver allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-14
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-96864
EUVD
EUVD-2026-99786

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows Server 2012 6.2.9200.0
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0
Microsoft Windows Server 2012 R2 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

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

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Executive Summary

This vulnerability is a double free issue in the Microsoft Failover Cluster Virtual Driver. A double free occurs when a program frees the same memory block twice, which can lead to memory corruption and allow an attacker to execute arbitrary code remotely over a network.

Impact Analysis

An unauthorized attacker could exploit this flaw to run malicious code on affected systems. This could lead to full system compromise, data theft, or unauthorized access to sensitive information. Systems running vulnerable versions of Windows Server or Windows 10 are at risk.

Compliance Impact

This vulnerability allows remote code execution via a double free in the Microsoft Failover Cluster Virtual Driver. Such unauthorized execution could lead to data breaches, unauthorized access, or data manipulation, which may violate compliance requirements under GDPR (data protection) and HIPAA (health data security).

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Microsoft Failover Cluster Virtual Driver. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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