Out of curiosity, what are real life examples of events or phenomena similar to code injection? The way many viruses work by making the cell produce their own DNA comes to mind. Also prompt injection is somewhere near that. But think of this far-fetched example: You commit murder using a binder folder, which ends up presented as evidence. When the judge is shown the binder, whatever he might read in it might alter his decision. It might be "exonerating" information, a threat, or a religious claim. Whatever that might free you by modifying his behaviour might be considerered a sort of injection through side-channels. A kid that writes "candy" in her mother's shopping list might work too.