GHSA-grx3-v6wv-8gq8MediumCVSS 5.5
WinFsp through 2.2.26215 contains a null pointer dereference vulnerability in the kernel driver's...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (10)
- https://nvd.nist.gov/vuln/detail/CVE-2026-93689
- https://github.com/winfsp/winfsp/commit/b8103265ec63fa87ac264c62bb796dbc38376652
- https://github.com/winfsp/winfsp
- 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/devctl.c#L68-L73
- 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
- https://github.com/advisories/GHSA-grx3-v6wv-8gq8