Stall is unlikely, unless the pilot or autopilot overcontrols the airplane.
Since wake turbulence is a vortex, there will likely be more rotational component than any other. If the roll limit of the autopilot is reached and it disconnects, the pilot will have to manually fly the airplane out of the vortex. Since the airplane is banked already, continuing the turn to get outside the lateral extent of the vortex may be the best approach.
So, at "maximum" altitude and 45+ degrees of bank, holding altitude and airspeed will be impossible. Stay out of the stall regime, and continue to fly the airplane. If you do get stall warning (buffet, stick shaker...), use your airplane's stall recovery procedure.
In the cited conditions, altitude loss is very likely. If you allow the airplane to stall, the altitude loss could well be several thousand feet. However, if you fly it out of the vortex, the loss will be minimal.