CVE-2025-65953 MEDIUM

CVE-2025-65953: NanoMQ UAF of retain message due to invalid MQTTV5 properties

Vendor Nanomq
Product nanomq
Weakness CWE-416
Published November 25, 2025
Last update November 26, 2025
View on NVD All CVEs

CVSS base score

6.0/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

What the vulnerability does

01Description

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.22.5, a Heap-Use-After-Free (UAF) vulnerability exists in the TCP transport component of NanoMQ, which relies on the underlying NanoNNG library (specifically in src/sp/transport/mqtt/broker_tcp.c). The vulnerability is due to improper resource management and premature cleanup of message and pipe structures under specific malformed MQTTV5 retain message traffic conditions. This issue has been patched in version 0.22.5.

Key dates

02Disclosure timeline

November 25, 2025 CVE published
November 26, 2025 Record updated