Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.
https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html
https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284