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CVE-2025-32713 is a local elevation-of-privilege vulnerability in the Windows Common Log File System (CLFS) driver. The flaw is a heap/pool-based buffer overflow in the CLFS code path traced to CClfsLogFcbPhysical::ReadLogBlock(). According to the provided analysis, when CLFS reads a log block from a volume whose logical sector size is greater than 512 bytes, and the context mode is not ClfsContextForward, the driver can use the container logical sector size as the copy length even when the destination buffer is smaller. This results in CcCopyRead copying more data than fits in the allocated pool buffer, causing user-controlled log data to overflow into adjacent kernel memory. Researchers reported that the vulnerable path can be reached directly via DeviceIoControl rather than only through the normal ReadLogRecord marshalling flow, and that exploitation was confirmed on Windows 11 Insider Preview Canary build 27774.1000 with CLFS HMAC mitigation enabled.
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A Windows Common Log File System Driver elevation of privilege vulnerability that Microsoft assessed as more likely to be exploited within 30 days of release.
A heap-based buffer overflow in the Windows Common Log File System Driver (CLFS) that allows a local attacker to elevate privileges. The vulnerability is in the CClfsLogFcbPhysical::ReadLogBlock() function and can be triggered via a specific IOCTL from user mode.
A local privilege escalation vulnerability in the Windows Common Log File System (CLFS) driver caused by a pool-based buffer overflow when reading log blocks from volumes with logical sector sizes larger than 512 bytes. It can be triggered via DeviceIoControl under specific conditions and was patched in Microsoft's June 2025 cumulative update.
An elevation-of-privilege vulnerability in the Windows Common Log File System (CLFS) driver described as a heap-based buffer overflow; noted as an area of focus due to exploitation in multiple ransomware operations (general CLFS exploitation mentioned, not explicitly this CVE).
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Cross-references every affected SKU, including bundled OEM variants.
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