TI-2025-40379 Aliases CVE-2025-65503 GHSA-957v-8427-4g8j

Use after free in endpoint destructors in Redboltz async_mqtt 10.2.5 allows local users…

LOW 38CWE-416Published 2025-11-24 · Updated 2025-11-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00236 14th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:redboltz:async_mqtt:10.2.5:::::::*	10.2.5	Vulnerable	Redboltz

cpe:2.3:a:redboltz:async_mqtt:10.2.5:*:*:*:*:*:*:* Versions 10.2.5 Vulnerable ·Redboltz

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-65503
2026-10-03 Alias added: GHSA-957v-8427-4g8j

References

Exploit 1

https://github.com/redboltz/async_mqtt/issues/436

Patch 1

https://github.com/redboltz/async_mqtt/pull/437

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences