If someone is going to go through that amount of effort to create a buffer overrun…they are a very determined individual! I’d think it’d be easier for the culprit to just burn the kiosk or w/e lol…
While there isn’t really anything in place to prevent such it seems like a really unlikely scenario. A couple people have had similar concerns in the past SparkFun 2D Barcode Scanner Breakout - Disable Setting Barcodes that I don’t believe ever manifested