If an authenticated client connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur. Affects versions 1.6 to 2.0.10 inclusive.
Fix possible crash having just upgraded from 1.6 if per_listener_settings true is set, and a SIGHUP is sent to the broker before a client has reconnected to the broker. Fix bridge not reconnectng if the first reconnection attempt fails. Improve QoS 0 outgoing packet queueing. Fix non-reachable bridge blocking the broker on Windows. Fix possible corruption of pollfd array on Windows when bridges were reconnecting. Fix QoS 0 messages not being queued when queue_qos0_messages was enabled.
If sending mosquitto_sub output to a pipe, mosquitto_sub will now detect that the pipe has closed and disconnect. Fix mosquitto_pub -l quitting if a message publication is attempted when the broker is temporarily unavailable.
sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-1382b4c7f5
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