Endless recursion when handling responses from an IAS-ECC card in iasecc_select_file in libopensc/card-iasecc.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to hang or crash the opensc library using programs.
access.redhat.com/errata/RHSA-2019:2154
github.com/OpenSC/OpenSC/commit/03628449b75a93787eb2359412a3980365dda49b#diff-f8c0128e14031ed9307d47f10f601b54
github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
lists.debian.org/debian-lts-announce/2019/09/msg00009.html
www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/