https://wccftech.com/modern-warfare-pc-update/

Infinity Ward has just rolled out a new Call of Duty Modern Warfare PC update that addresses the stuttering issues during cutscenes alongside a fix for dev error 6178.

Yesterday we reported on the upcoming Modern Warfare 1.09 patch that will focus on fixing officer progression and challenge bugs. Today, Infinity Ward has rolled out a PC-only update that fixes the above-mentioned issues alongside overall stability improvements.