The decision to charge the player - often described as "playing under formal investigation" does not suggest prof of wrong doing, rather that prosecutors feel they have serious grounds to pursue the matter.
However it does not mean Benzema definitely faces a trial.
The 34-year-old, who is set to appear on the French version of Strictly Come Dancing in the coming weeks, recently announced he was taking a break from football: but maintained he was not yet retiring.
While police have failed to confirm the existence of the alleged sex tape, Versailles investigators said that Cisse was being held in relation to an alleged plan to extort the 31-year-old Valbuena of money.
During their conversations the suspects, who were charged back in October and remanded in custody, talked about the "involvement" of Benzema, in trying to convince his fellow France player Valbuena to pay up.