In GNU Chess 6.2.5, there is a stack-based buffer overflow in the cmd_load function in frontend/cmd.cc via a crafted chess position in an EPD file.
https://lists.gnu.org/archive/html/bug-gnu-chess/2019-08/msg00005.html
https://lists.gnu.org/archive/html/bug-gnu-chess/2019-08/msg00004.html