> In general in v8 exploitation, once you've reached a point where you can read and write arbitrary memory, you find that v8 will only create either RW or RX pages for you when the JIT compilation happens. WASM is a neat little trick for getting a handle to a RWX page.

It's not a neat trick, but a grave problem of WASM model.

WASM memory (in)security will be a big problem until all of memory security tricks from native code will be migrated to WASM world, and then there will be not much use of WASM anymore.