Yes, all minor updates (like 3.0.3) are free even without the Booster Course Pass. However, some track fixes apply only to DLC tracks, which require purchasing the pass.
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The primary purpose of version 3.0.3 is fixing a security flaw in the game's netcode . Specifically, it addresses a buffer overflow issue that could have potentially left players vulnerable during online sessions. Yes, all minor updates (like 3