PT-2026-95433

CVE-2026-93689

Published

2026-09-18

Updated

2026-09-18

Description by

CVSS 4.0

6.8

Medium

MetricsAV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions WinFsp versions prior to 2.2.26216

Description A null pointer dereference occurs in the kernel driver's Fast I/O device control handler due to a failure to validate the volume context before use. An unprivileged local user can cause a system crash and denial of service by opening the WinFsp control device and issuing FSP IOCTL TRANSACT requests.

Recommendations Update WinFsp to version 2.2.26216 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

Luigino Camastra

Vendors

Affected products

Weakness enumeration

CWE-476: NULL Pointer Dereference

Related identifiers