CVE-2026-69617: Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Out-of-bounds read in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
Other sources
Windows Resilient File System (ReFS) Elevation of Privilege 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 10.0.28000.2954Patch KB5124012 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected system and able to act locally. The available data does not indicate that it is remotely exploitable.
Which systems are identified as affected?
The affected software listed is Microsoft Windows 11 and Microsoft Windows Server 2025.
What level of impact could successful exploitation have?
Successful exploitation can elevate an authorized local attacker's privileges. The supplied vector also rates confidentiality, integrity, and availability impact as high.