What is CVE-2025-65503?

CVE-2025-65503 is a medium-severity vulnerability in Redboltz Async Mqtt, classified under Use After Free. CVSS score: 5.5/10. Published 2025-11-24.

How severe is CVE-2025-65503?

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

Use After Free in Redboltz Async Mqtt

CVE-2025-65503

Use after free in endpoint destructors in Redboltz async_mqtt 10.2.5 allows local users to cause a denial of service via triggering SSL initialization failure that results in incorrect destruction order between io_context and endpoint objects.

Vulnerability class: Use-After-Free

EPSS: 0.002 (12.2th percentile) — read the EPSS interpretation.

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.

Affected products

Redboltz Async_mqtt — versions 10.2.5
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org (Exploit, Patch, Issue Tracking)
cve@mitre.org (Patch, Issue Tracking)

Frequently asked questions

What is CVE-2025-65503?: CVE-2025-65503 is a medium-severity vulnerability in Redboltz Async Mqtt, classified under Use After Free. CVSS score: 5.5/10. Published 2025-11-24.
How severe is CVE-2025-65503?: Medium severity. CVSS v3 base score is 5.5 out of 10.