WinFsp through 2.2.26215 NULL Pointer Dereference via Fast I/O
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.
CVE-2026-93689
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-93689
winfsp
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/winfsp/winfsp",
"vendor": "winfsp",
"product": "winfsp",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "2.2.26215"
}
],
"packageURL": "pkg:github/winfsp/winfsp",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-93689
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #1706 · Revision 1
- Added to Heist Feed
- Publisher date