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CVE-2025-62456 · Windows Resilient File System (ReFS) Remote Code Execution Vulnerability

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.

Severity
Important
Impact
Remote Code Execution
CVSS
8.8 base · 7.7 temporal
Release
2025-12-09
Signals
Windows Resilient File System (ReFS) Remote Code Execution Exploited: No Publicly disclosed: No Exploitability: Exploitation Unlikely
CWE
CWE-122: Heap-based Buffer Overflow
Patch Diff
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Description
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.
FAQ / Articles
Windows Resilient File System (ReFS) Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to execute code over a network.
FAQ
How could an attacker exploit this vulnerability? An authenticated attacker with access to a shared folder on a system using a Resilient File System (ReFS) volume could exploit this vulnerability by running a specially crafted operation against the folder.
FAQ
According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability? Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.