CVE-2024-43500: Windows Resilient File System (ReFS) Information Disclosure Vulnerability

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-08 · updated 2026-08-19
Weakness: CWE-126

Description

Windows Resilient File System (ReFS) Information Disclosure Vulnerability

Affected products

Microsoft Windows 11: before 10.0.22621.4317 — fixed in 10.0.22621.4317
Microsoft Windows 11: before 10.0.22631.4317 — fixed in 10.0.22631.4317
Microsoft Windows 11: before 10.0.26100.2033 — fixed in 10.0.26100.2033
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1189 — fixed in 10.0.25398.1189
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.4317 — fixed in 10.0.22621.4317
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.4317 — fixed in 10.0.22631.4317
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.4317 — fixed in 10.0.22631.4317
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.2033 — fixed in 10.0.26100.2033
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1189 — fixed in 10.0.25398.1189

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.22621.4317; Microsoft Windows 11 10.0.22631.4317; Microsoft Windows 11 10.0.26100.2033; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1189; Microsoft Windows 11 10.0.22621.4317; Microsoft Windows 11 version 22H3 10.0.22631.4317; Microsoft Windows 11 10.0.22631.4317; Microsoft Windows 11 10.0.26100.2033; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1189. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43500

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