Only if they are leaking. If the CCV freezes closed, it pressurizes the crankcase and the valve cover gaskets are a common point of failure.

If it freezes open, oil can be drawn from the sump into the intake manifold, where it can enter the cylinders.

It is unlikely to freeze in both modes simultaneously IMO.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue