Mario Kart 8 Deluxe Update 3.0.3 Jun 2026

“We have to roll back,” Luigi whispered, trembling. “We have to go to 3.0.2.”

If you just booted up Mario Kart 8 Deluxe and saw a notification for , you might be racing to Google to find out which new characters, tracks, or items have been added. mario kart 8 deluxe update 3.0.3

According to technical reports shared by Nintendo Life , the update specifically targeted a security flaw in the game's netcode. Dataminers noted that only a few lines of code were modified, likely to fix a buffer overflow vulnerability that could have affected online security. “We have to roll back,” Luigi whispered, trembling

The primary focus of update 3.0.3 is technical refinement. Following the massive influx of content from the final waves of the Booster Course Pass, some players reported minor graphical hitches or unexpected behavior during high-intensity online play. Dataminers noted that only a few lines of