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CVE-2026-93689

WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O

CVSS 4.0 6.8 MEDIUMCVSS 3.1 5.5 MEDIUMCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-93689

Published

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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Advisory history

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23 Oct 2026 15:48:27 UTC

WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O

cve-program · CVE-2026-93689 · Published

This historical link shows only this version and versions saved before it. Browse all advisory history.

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Sources read 12 Nov 19:39 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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