CVE-2025-24985
Windows Fast FAT File System Driver Remote Code Execution Vulnerability
In short
A flaw in Windows' FAT file system driver allows an attacker to execute malicious code on a computer through a specially crafted file. This happens because the driver doesn't properly check numeric values, which can cause it to allocate memory incorrectly.
Technical detail
An integer overflow vulnerability in the Windows Fast FAT Driver (CWE-122, CWE-190) enables local code execution when processing malformed FAT filesystem structures. The vulnerability requires local file system access but no user interaction, allowing an authenticated attacker to trigger memory corruption and achieve arbitrary code execution with elevated privileges.
Summary generated and translated by AI from the official description.
Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1507Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 22H2Microsoft · Windows 11 version 22H3Microsoft · Windows 11 Version 23H2Microsoft · Windows 11 Version 24H2Microsoft · Windows Server 2008 R2 Service Pack 1Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)Microsoft · Windows Server 2008 Service Pack 2Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2012 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 1
githubgithub.com/airbus-cert/cve-2025-24985★ 2⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24985https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24985https://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-detection-scripthttps://www.vicarius.io/vsociety/posts/cve-2025-24985-integer-overflow-vulnerability-in-microsoft-windows-fast-fat-driver-mitigation-script