In the coff_pointerize_aux function in coffgen.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.30, an index is not validated, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted file, as demonstrated by objcopy of a COFF object.
https://sourceware.org/bugzilla/show_bug.cgi?id=22741
https://security.gentoo.org/glsa/201811-17
https://access.redhat.com/errata/RHSA-2018:3032
https://access.redhat.com/errata/RHBA-2019:0327
http://www.securityfocus.com/bid/103077
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00072.html