<i>"However, while real X86 processors have a maximum instruction length of 15 bytes, QEMU's instruction decoder for X86 does not place any limit on the instruction and length or the number of instruction prefixes."</i><p>Interesting, and not your usual type of exploit. Guessing this isn't one that will have the Rust crowd doling out "told ya so" :). Logic error only. No buffer overflow, not much strong types do for you, etc.