CVE-2022-50238

Kernel compromise via incomplete driver blocklist

Published Sep 8, 2025 · Updated Nov 17, 2025

Incomplete driver blocking in Microsoft Windows allows local users to run vulnerable signed drivers omitted from the endpoint list. The Windows Update-delivered DriverSiPolicy blocklist intentionally omits some rules from Microsoft’s fuller downloadable policy to preserve compatibility. Exposure requires a vulnerable signed driver and an enforcement configuration that relies on the smaller list; Microsoft disputes that this compatibility tradeoff is a vulnerability.

CVSS severity7.4
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incomplete driver blocking in Microsoft Windows allows local users to run vulnerable signed drivers omitted from the endpoint list. The Windows Update-delivered DriverSiPolicy blocklist intentionally omits some rules from Microsoft’s fuller downloadable policy to preserve compatibility. Exposure requires a vulnerable signed driver and an enforcement configuration that relies on the smaller list; Microsoft disputes that this compatibility tradeoff is a vulnerability.

The record

CVE
CVE-2022-50238
Published
Sep 8, 2025
Updated
Nov 17, 2025
Vendor
Microsoft
Product
Windows
Classifications
CWE-184, CWE-820, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10 <=Server 2025

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Microsoft · Windowsversion=10 <=Server 2025

Published CVSS scores

7.4MITRECVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.7CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
CWE-820Missing Synchronization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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