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WinFsp WinFspWinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O

Risk 32
Severity
5.5
Null Pointer Dereference
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

WinFsp through 2.2.26215 contains a null pointer dereference vulnerability in the kernel driver's Fast I/O device control handler that fails to validate the volume context before use. An unprivileged local user can trigger a denial of service by opening the WinFsp control device and issuing FSPIOCTLTRANSACT requests, causing a system crash.

First published (updated )
CVE-2026-93689

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