Speedrunners have discovered arbitrary code execution in the original Super Mario Bros., allowing access to any level without hacks. Speedrunner Kosmic detailed the glitch in a YouTube video, noting its potential despite current limitations. The find builds on a crash observed in a related game.
Speedrunner Kosmic shared details of a new glitch in Super Mario Bros. on YouTube this week. The exploit enables arbitrary code execution (ACE), a technique previously used in games like The Legend of Zelda: The Wind Waker and various Pokémon titles, but never in the 1985 NES classic until now. Community members identified the possibility after a crash in @TheLuigiSidekick's playthrough of The Lost Levels on Nintendo Switch Online prompted further investigation into the original game.