opensc is vulnerable to denial of service (DoS). It is due to double free handling responses from smartcards in libopensc/sc.c:sc_file_set_sec_attr().
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index
access.redhat.com/errata/RHSA-2019:2154
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1656791
bugzilla.redhat.com/show_bug.cgi?id=1672898
github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-db0cd89ff279ad8c7b3bb780cdf2770a
github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/