An issue was discovered in GNU recutils 1.8. There is a heap-based buffer overflow in the function rec_fex_parse_str_simple at rec-fex.c in librec.a.
https://github.com/TeamSeri0us/pocs/tree/master/recutils/bug-report-recutils/recfix
https://github.com/TeamSeri0us/pocs/blob/master/recutils/bug-report-recutils/