Switch 2 Jailbreak Exposes Homebrew Vulnerability
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A security researcher demonstrated a software‑only jailbreak of the Switch 2, gaining userland access that allows running homebrew, backing up save files, and accessing most peripherals. The exploit relies on an integer overflow in the original Switch version of SmileBasic 4, a programming environment previously used in the 3DS smilehax hack. After about two weeks of testing, the researcher discovered a 32‑bit overflow that exposes an array pointer, enabling read/write access to system memory. From there, a buffer overflow in the FileSystem services module granted arbitrary read/write privileges, leading to native code execution. The proof‑of‑concept included modded characters in Mario Kart World, but the current userland exploit remains sandboxed and does not provide kernel‑level control.
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Timeline
- On March 3 2017 Nintendo Switch released worldwide.
- On June 8 2025 First Switch 2 jailbreak discovered.
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