What is CVE-2022-43588?

CVE-2022-43588 is a medium-severity vulnerability in Callback Cbfs Filter, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-11-28.

How severe is CVE-2022-43588?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Callback Cbfs Filter

CVE-2022-43588

A null pointer dereference vulnerability exists in the handle_ioctl_83150 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.

Published 2022-11-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Callback Cbfs Filter — versions 20.0.8317
Callback Technologies Cbfs Filter — versions 20.0.8317

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

talosintelligence.com/vulnerability_reports/TALOS-2022-1647 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-43588?: CVE-2022-43588 is a medium-severity vulnerability in Callback Cbfs Filter, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-11-28.
How severe is CVE-2022-43588?: Medium severity. CVSS v3 base score is 5.5 out of 10.