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
Published · last modified .
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 (11.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.5% 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
- Redboltz Async Mqtt — versions 10.2.5
Weakness classification (CWE)
References
- github.com/redboltz/async_mqtt/issues/436 (Exploit, Patch, Issue Tracking)
- github.com/redboltz/async_mqtt/pull/437 (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.