CVE-2026-70116: Windows Resilient File System (ReFS) Security Feature Bypass Vulnerability
Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to bypass a security feature with a physical attack.
Other sources
Windows Resilient File System (ReFS) Security Feature Bypass 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 10.0.28000.3231Patch KB5127646 - 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 10.0.26100.33650Patch KB5126646 - 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 10.0.26100.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems should be prioritized for triage?
Prioritize Microsoft Windows 11 and Microsoft Windows Server 2025 systems where an attacker could obtain physical access. The issue is associated with the ReFS file system.
What access and interaction does exploitation require?
The attacker needs physical access and exploitation has high attack complexity. No privileges or user interaction are required according to the provided severity vector.