WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O

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.

Successful exploitation of the integer overflow vulnerability could allow an attacker to achieve system-level access to the affected software.

Race Condition Vulnerability

Successful exploitation of the race condition vulnerability could allow an attacker to trigger a kernel heap overflow, potentially leading to local privilege escalation and granting system-level access to the affected software.