CVE-2026-61633 NanoMQ: Infinite Loop in UNSUBSCRIBE Decoder Leading to Remote DoS

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nnimqttmsgdecodeunsubscribe in nng/src/supplemental/mqtt/mqttcodec.c does not handle a failed readuint16 while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curp...