In my reading up on ImageMagick, I came across this:
https://imagetragick.com/
Are Kindles running the screensaver hack under risk? i.e by downloading a booby-trapped image? I would think(hope?

), that the Kindle OS mishmash of linux/java/javascript is too weird for any such exploit.
Some mitigation steps are suggested. I assume NiLuJe would've incorporated them into the latest build..?