The aout_get_external_symbols function in aoutx.h in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29.1, allows remote attackers to cause a denial of service (slurp_symtab invalid free and application crash) or possibly have unspecified other impact via a crafted ELF file.
https://security.gentoo.org/glsa/201811-17
https://sourceware.org/bugzilla/show_bug.cgi?id=22306
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0301ce1486b1450f219202677f30d0fa97335419