EUVD-2026-30965CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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3DescriptionNVD
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In versions 0.24.10 and below, when NanoMQ handles high-concurrency reconnect traffic using a reconnect-collision payload, the broker can crash due to a NULL pointer dereference during MQTT session resumption for clean_start=0 clients. The transport's p_peer callback (tcptran_pipe_peer()) iterates cpipe->subinfol while copying session metadata from the cached old pipe to the new reconnecting pipe, without checking whether the pointer is NULL. Under a reconnect race, cpipe->subinfol can be freed and set to NULL before session restore invokes this function, resulting in a remote unauthenticated Denial-of-Service (process crash) condition. This issue has been fixed in version 0.24.11.
AnalysisAI
Remote unauthenticated denial-of-service in NanoMQ MQTT Broker (versions 0.24.10 and below) crashes the broker process via a NULL pointer dereference triggered by high-concurrency MQTT reconnect traffic. The flaw occurs during session resumption for persistent-session clients (clean_start=0), where the NanoNNG transport layer's pipe_peer() function dereferences cpipe->subinfol without verifying that the new pipe's subinfol pointer is also non-NULL - a pointer that can be freed mid-race. …
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