An issue was discovered in LibRaw 0.18.9. There is a stack-based buffer overflow in the utf2char function in libraw_cxx.cpp.
https://usn.ubuntu.com/3639-1/
https://github.com/LibRaw/LibRaw/issues/144
https://github.com/LibRaw/LibRaw/commit/efd8cfabb93fd0396266a7607069901657c082e3