I think we should probably leave this unfixed in stable and LTS for now,
until we have a better idea of whether the regression is a real thing.
cc -lts to warn off the LTS team from doing anything overzealous for now.
I am by no means an expert on either the gdk-pixbuf codebase, the finer
points of JPEG parsing, or reproducing fuzzer-generated crashes in a
more reasonable environment, so I would very much appreciate it if
someone who is better at those topics (and ideally someone who can spend
their paid time on it!) can take it from here.