The 27-year-old joined QPR from Sunderland in 2011 but, after impressing last season, has struggled for form this term.
It is understood the centre-back is in talks with Bursaspor over a loan move, although it is unclear as to whether it is with a view to a permanent transfer.
The Turkish side is already home to England international goalkeeper Scott Carson and signed Stoke midfielder Maurice Edu on loan earlier this month.