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.
Published: 2026-09-18
Score: 6.8 Medium
EPSS: n/a
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

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
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-18T16:18:45.126Z

Reserved: 2026-09-18T14:39:01.816Z

Link: CVE-2026-93689

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-18T16:17:15.837

Modified: 2026-09-18T17:17:07.437

Link: CVE-2026-93689

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses