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6.8 Medium

CVE-2026-93689 WinFsp through 2.2.26215 contains a null pointer dereference vulnerability in the kernel driver's Fast I/O device…

Description

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 FSP_IOCTL_TRANSACT requests, causing a system crash.

Affected products and versions

Product Affected versions Fixed in
WinFSP 2.2 earliest → 2.2.26215 No fix stated

Other CVEs of WinFSP

The 3 CVEs of WinFSP →
CVE-2026-7162 Successful exploitation of the integer overflow vulnerability could allow an attacker to achieve system-level access… 7.8 High CVE-2026-3006 Successful exploitation of the race condition vulnerability could allow an attacker to trigger a kernel heap overflow,… 7.0 High
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