The Czech international has suffered a torrid spell with injuries since joining the Midlands club.
Aston Villa striker Libor Kozak appears to be leaving the club.
Players from Leeds United, Aston Villa, Queens Park Rangers and Cardiff City all feature.
To say that Aston Villa have been on a downward spiral in recent seasons would be an understatement, and with a steady decline comes its fair share of disappointing signings.
Aston Villa currently have two players on permanent contracts that are set to expire this summer.
Aston Villa's Libor Kozak's contract expires at the end of the season.
Could any of the following leave Aston Villa this month?
Aston Villa owner says Libor Kozak is emblematic of the club's problems.
Garner's injury could prompt Rangers manager Mark Warburton to add to his Ibrox ranks in January.
The 27-year-old Czech striker has only made two substitute appearances for the club this season and is entering the final six months of his contract.