An issue was discovered in GNU libiberty, as distributed in GNU Binutils 2.32. It is a heap-based buffer over-read in d_expression_1 in cp-demangle.c after many recursive calls.
https://usn.ubuntu.com/4336-1/
https://usn.ubuntu.com/4326-1/
https://support.f5.com/csp/article/K13534168
https://security.netapp.com/advisory/ntap-20190314-0003/