I received this notification from Avast for android today: Nova Launcher contains malware! It may harm you device.
Surely this has to be a mistake.
If NOVA has its data collector enabled (usally in settings) then avast may flag it.
polonus
You can report a suspected FP here: https://www.avast.com/false-positive-file-form.php
FP will be fixed in the next VPS update.