A type confusion error within the "unpacked_load_raw()" function within LibRaw versions prior to 0.19.1 (internal/dcraw_common.cpp) can be exploited to trigger an infinite loop.
https://lists.debian.org/debian-lts-announce/2019/03/msg00036.html
https://secuniaresearch.flexerasoftware.com/secunia_research/2018-27/