vLLM versions prior to 0.32.0 contain a resource exhaustion vulnerability in the P2P secondary tier management. An API client can submit many unique peer addresses that never establish connections, causing vLLM to retain sessions and ZeroMQ sockets indefinitely. This leads to exhaustion of the ZeroMQ context socket quota, raising a ZMQError that terminates the EngineCore and shuts down the API server. The vulnerability allows denial of service without requiring privileged access or internal listener connectivity. A fix is available in vLLM 0.32.0.