What is CVE-2023-43771?

CVE-2023-43771 is a medium-severity vulnerability in Mikebrady Not Quite Ptp, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2023-09-22.

How severe is CVE-2023-43771?

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

Resource exhaustion in Mikebrady Not Quite Ptp

CVE-2023-43771

In nqptp-message-handlers.c in nqptp before 1.2.3, crafted packets received on the control port could crash the program.

Vulnerability class: DoS (Denial of Service)

Published 2023-09-22 · 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: 0.002 (13.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Mikebrady Not Quite Ptp

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

github.com/mikebrady/nqptp/commit/b24789982d5cc067ecf6e8f3352b701d177530ec (Patch)
github.com/mikebrady/nqptp/releases/tag/1.2.3 (Release Notes)
github.com/mikebrady/nqptp/releases/tag/1.2.4 (Release Notes)

Frequently asked questions

What is CVE-2023-43771?: CVE-2023-43771 is a medium-severity vulnerability in Mikebrady Not Quite Ptp, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2023-09-22.
How severe is CVE-2023-43771?: Medium severity. CVSS v3 base score is 5.5 out of 10.