Gus Poyet delighted to have Anthony Reveillere at Sunderland ranks, with the Frenchman among the best Bosmans available.
Nottingham Forest will find out next month if they face a transfer embargo for breaching Financial Fair Play rules.
The 30-year-old has struggled to cement a starting place since the arrival at Ewood Park of Henning Berg.
After 11 appearances in the Championship this season, Orr was an unused substitute in the 1-1 draw at home to Birmingham, having to make way for 18-year-old Adam Henley.
Orr's deal with Mick McCarthy's side is due to end on January 26.
The veteran defender moved to Ewood Park in January this year after a spell of nearly three years with QPR.