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.
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History
Fri, 18 Sep 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O | |
| Weaknesses | CWE-476 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-18T16:18:45.126Z
Reserved: 2026-09-18T14:39:01.816Z
Link: CVE-2026-93689
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Status : Received
Published: 2026-09-18T16:17:15.837
Modified: 2026-09-18T17:17:07.437
Link: CVE-2026-93689
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Weaknesses