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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
winfsp winfsp
Default version status: unaffected
0 to ≤ 2.2.26215affected
pkg:github/winfsp/winfspReferences
- https://github.com/winfsp/winfsp/commit/b8103265ec63fa87ac264c62bb796dbc38376652 ↗
- https://github.com/winfsp/winfsp ↗
- https://github.com/winfsp/winfsp/blob/v2.2B4/src/sys/devctl.c#L68-L73 ↗
- https://github.com/winfsp/winfsp/blob/v2.2B4/src/sys/devctl.c#L105-L114 ↗
- https://github.com/winfsp/winfsp/blob/v2.2B4/src/sys/devctl.c#L146-L152 ↗
- https://github.com/winfsp/winfsp/blob/v2.2B4/src/sys/volume.c#L1059-L1060 ↗
- https://github.com/winfsp/winfsp/releases/tag/v2.2B4 ↗
- https://www.vulncheck.com/advisories/winfsp-through-2.2.26215-null-pointer-dereference-via-fast-i-o ↗