CVE-2026-70097: Windows Virtualization-Based Security (VBS) Enclave Spoofing Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing locally.
Other sources
Windows Virtualization-Based Security (VBS) Enclave Spoofing 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 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - 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 10.0.26300.9711Patch KB5127648 - 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 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
Which environments should be prioritized for review?
Review systems running Microsoft Windows 11, Windows Server 2025, Windows Server 2022, or Microsoft Windows Virtualization-Based Security (VBS). The issue specifically concerns the VBS Enclave component.
What level of access and effort does exploitation require?
An attacker must already be authorized on the affected system and exploit the issue locally. Exploitation has high attack complexity and does not require user interaction.
What is the expected security impact?
The reported impact is spoofing with integrity impact, while confidentiality and availability impacts are not indicated. The scope is changed, meaning the impact can extend beyond the initially vulnerable security authority.