CVE-2023-1640Public exploit

Local denial of service via IOCTL 0x222010

Published Mar 26, 2023 · Updated Aug 2, 2024

Denial of service in IObit Malware Fighter 9.4.0.776 allows local users to interrupt the system via IOCTL 0x222010. The ObCallbackProcess.sys IOCTL handler improperly shuts down or releases a resource while processing unspecified input; public sources do not identify the resource. Low-privileged local access is required, and the published impact is limited to availability, with no reported disclosure, modification, or privilege gain.

CVSS severity5.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IObit Malware Fighter 9.4.0.776 allows local users to interrupt the system via IOCTL 0x222010. The ObCallbackProcess.sys IOCTL handler improperly shuts down or releases a resource while processing unspecified input; public sources do not identify the resource. Low-privileged local access is required, and the published impact is limited to availability, with no reported disclosure, modification, or privilege gain.

The record

CVE
CVE-2023-1640
Published
Mar 26, 2023
Updated
Aug 2, 2024
Vendor
IObit
Product
IObit Malware Fighter
Classifications
CWE-404, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=9.4.0.776

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

IObit · IObit Malware Fighterversion=9.4.0.776

Published CVSS scores

4.6VulDB CNAAV:L/AC:L/Au:S/C:N/I:N/A:C
5.5VulDB CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

Public exploit references

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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