Is CVE-2026-93689 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-93689?

CVE-2026-93689 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-93689

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.