Do not vTaskDelete() any other task than the current one (vTaskDelete(NULL);). If you have to, try only closing the socket from the other task, and have the socket-reading task check the value returned from recvfrom() for 0/-1 and then delete itself after releasing any ressources it may hold. Previ...

I use socket(addrFamily, SOCK_DGRAM, ipProtocol); or socket(addrFamily, SOCK_STREAM, ipProtocol); to create UDP/TCP socket, then bind(), then recv()/recvfrom() in a FreeRTOS task, then vTaskDelete(the recv task) and close() it in another FreeRTOS task, whatever it is a TCP or UDP, seems the fd seems...