Nothing in the laws around this one. The goalie is in clear control whilst in his hands, chooses to release, and it's intercepted after. If he had kicked out of hands and had been intercepted in a similar fashion to the throw, there would be no foul.
Benzema doesn't touch the ball till after it has travelled some distance; that's the key to this situation.
The goalie is considered in possession even if he dropping from hands to feet to kick, but the ball has moved already before Benzema intercepts it.
Stuff have a shot at the moment of release here - https://i.stuff.co.nz/sport/football/world-game/10...
, and the video as well. There is a good 2 metres between them, and the goalie is moving towards benzema! it's just a terrible error of judgement by the keeper.
Edit - also some interesting discussion here : https://www.refchat.co.uk/threads/champions-league...