The defender has appeared 20 times for the Rebels already this season, prior to rejoining his old club on loan at the turn of the year.
The 27-year-old made a further 19 appearances for the U’s but was unable to help the club avoid relegation from the Isthmian League Premier Division.
Black links back up with Chris Agutter’s squad ahead of the final regular season match at Enfield Town on Saturday and potential post-season play-off campaign.
Agutter’s defensive options will be restricted by the suspensions of Aarran Racine and Sam Beard, while Joe Cook played through a knock against Dorking Wanderers on Easter Monday.