Heap-Use-After-Free Vulnerability in NanoMQ MQTT Broker
CVE-2025-65953

6MEDIUM

Key Information:

Vendor

NanoMQ

Status
NanoMQ
Vendor
CVE Published:
25 November 2025

What is CVE-2025-65953?

The NanoMQ MQTT Broker, an edge messaging platform, is susceptible to a Heap-Use-After-Free vulnerability in its TCP transport component. This issue arises from inadequate resource management resulting in a premature cleanup of message and pipe structures. It specifically affects cases involving malformed MQTTV5 retain message traffic, which could lead to unexpected behavior or further exploitation. Users are advised to upgrade to version 0.22.5 or later where this vulnerability has been addressed.

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Affected Version(s)

nanomq < 0.22.5

References

https://github.com/nanomq/nanomq/security/advisories/GHSA...
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CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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