Nintendo Switch 2 Modding: Early Homebrew and Hack News

Early days of the Switch 2 have already seen an active modding scene. The new handheld uses a custom Nvidia Tegra “Ampere” SoC with 8 CPU cores (Arm Cortex‑A78C) and an Ampere‐based GPU (about 1,536 CUDA cores) . Nvidia boasts this chip delivers roughly 10× the original Switch’s graphics performance, thanks to integrated RT (ray tracing) and Tensor (DLSS upscaling) cores . In practice, reviewers find the docked Switch 2 rivals a GTX 1050 Ti, with DLSS likely used for 4K output and up to 120 FPS handheld . This beefy hardware also supports a fast new MicroSD Express interface with PCIe Gen3 x1 and NVMe storage, as we discuss below.

Faster Storage: NVMe via microSD Express

Modders have already built an open‐source NVMe SSD adapter for the Switch 2. Because the console’s microSD Express slot follows the SD Express 7.1 spec, it exposes a true PCIe Gen3 x1 link using the NVMe protocol . In other words, an adapter board (the SDEX2M2 project by NVNTLabs) simply reroutes the microSD slot pins to an M.2 2230 NVMe SSD. No protocol conversion is needed – the Switch 2’s controller speaks NVMe natively . In practice you can expect up to ~1 GB/s transfer speeds (max of PCIe x1) . This means cheaper, high‑capacity SSDs (e.g. 1 TB M.2 modules) can serve as storage, instead of expensive SD Express cards . (Builders caution to use only low‑voltage M.2 2230 drives and warn not to plug the adapter into an original Switch’s slot.)

※ Getting it working: The NVNTLabs adapter design (on GitHub) shows early prototype PCBs mapping the PCIe lanes. It’s still “work in progress,” with an MCU needed for the handshaking, but it already demonstrates that Switch 2 can boot from a standard NVMe SSD via microSD Express . This could let homebrewers expand storage far beyond microSD card sizes at a fraction of the cost.

Day‑1 Exploit: Userland ROP

Within a day of launch, hacker David Buchanan demonstrated a minor userland exploit on Switch 2 (firmware 20.1.1). He found a flaw in a shared library and executed a return-oriented programming (ROP) chain that simply draws custom graphics on screen . This “checkerboard demo” shows that arbitrary code can run at user level, but it does not break out to the OS or kernel . In short, it’s a proof‑of‑concept with no practical benefit yet (and Buchanan himself admits he can’t even prove it’s not just a harmless video playback).

So far this exploit only runs in user space and doesn’t jailbreak the device, modify firmware, or allow loading of homebrew. Nintendo’s Switch 2 firmware remains tightly locked down. As Tom’s Hardware notes, this vulnerability “won’t jailbreak the console” and other modders agree it’s purely a novelty for now . It may, however, hint at future breakthroughs – sometimes initial userland bugs lead to kernel exploits down the road. For now, homebrew enthusiasts are watching and waiting for any deeper vulnerabilities

Modding Game Saves

With no true CFW yet, some modders are experimenting with game save data as a workaround. For example, users have successfully transfered saves between a hacked Switch 1 and a Switch 2 using Nintendo’s built‑in tools . One test involved loading a clean Breath of the Wild save on Switch 2 (via the Virtual Game Card transfer), playing a bit, then sending it back to the original Switch where modded content could be added . In effect, this lets you: – Play unmodded or patched games on Switch 2 for faster performance, and then send the saves back to a modded Switch 1 to use existing cheat tools or save editors. – Or create modded item builds (in Zelda or Splatoon, for example) on a legacy console, transfer the save to Switch 2, and then generate share codes or continue the game there.

This workflow uses normal system transfers, cloud saves, and Nintendo’s “virtual card” backup features – no custom code is running on the Switch 2 itself. It simply moves data around. Community posts suggest this method “should be fine as long as you’re not pirating and your mods don’t affect other players” . However, caution is advised: some community members suspect that loading certain corrupted or specially edited saves might even trigger software protections (the “userland bug” might have been related to a bad save load ). In any case, save‑file modding on Switch 2 is still very experimental, but it’s one early avenue for getting modded content into next‑gen games.

“MIG” Flash Cartridge and Ban Risks

A big name in Switch 1 modding, the MIG Switch (now marketed as MIG Flash), also works on Switch 2 – but only at great risk. The MIG is a reprogrammable game cartridge: it looks like a Switch game and can hold multiple ROM backups on its microSD slot. In practice, a firmware update quickly enabled Switch 1 games to run from the MIG on Switch 2 hardware . This means you can play old Switch games (from your own dumps) on the new console without emulation.

However, Nintendo has responded harshly. Multiple reports confirm that any Switch 2 console used with a MIG Flash is being banned from online services . Affected users get error code 2134-4508 and lose all network features (eShop, online play, cloud saves, etc.) . The ban is reportedly on the console itself, not the Nintendo Account (accounts remain linked but can’t connect on the banned device) . Importantly, Nintendo doesn’t just target obvious pirates – even if you play legally dumped backups, the MIG still trips the anti‑piracy checks.

Why so strict? Nintendo’s servers use unique cartridge identifiers (CID, certificate, Card Set ID) to validate games. If the same game ID suddenly appears on two consoles via one cart, the system flags it as piracy . In practice, users found their consoles flagged even though they claimed to only use “legal” own-game copies . Given this, plus Nintendo’s updated EULA granting it the right to brick any console caught running unauthorized hardware or software , using the MIG Flash on Switch 2 is extremely risky. It’s still technically possible to play offline (banned Switch 2 isn’t completely bricked), but losing online breaks most of the console’s value . In short: MIG works, but it’s pretty much guaranteed to get your Switch 2 locked out of online features

Where We Stand

In summary, Switch 2 modding is in its infancy. Hackers have confirmed some hardware potential (NVMe storage, etc.) and tiny exploits, but no full jailbreak or custom firmware yet. Enthusiasts are exploring creative angles – from SSD adapters to save‑file tricks – but Nintendo’s protections (including console bans) remain formidable. Nevertheless, the scene moves fast. If history is any guide, the first true Switch 2 homebrew solution (a kernel exploit or modchip) may surface within months. Until then, modders can experiment with ideas like the NVMe adapter and save transfers , always mindful of the EULA and ban risks.