What is CVE-2024-42651?

CVE-2024-42651 is a high-severity vulnerability in Emqx Nanomq, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-07-29.

How severe is CVE-2024-42651?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Emqx Nanomq

CVE-2024-42651

NanoMQ v0.17.9 was discovered to contain a heap use-after-free vulnerability via the component sub_Ctx_handle. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted SUBSCRIBE message.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.004 (33.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Emqx Nanomq — versions 0.17.9
N/a — versions n/a

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-42651?: CVE-2024-42651 is a high-severity vulnerability in Emqx Nanomq, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-07-29.
How severe is CVE-2024-42651?: High severity. CVSS v3 base score is 7.5 out of 10.