CVE-2021-22945

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

Cuando se envían datos a un servidor MQTT, libcurl versiones anteriores a 7.73.0, incluyéndola y 7.78.0, podría en algunas circunstancias, mantener erróneamente un puntero a un área de memoria ya liberada y usarlo de nuevo en una llamada posterior para enviar datos y también liberarlo *de nuevo*