Memory leak in the vcard_apdu_new function in card_7816.c in libcacard before 2.5.3 allows local guest OS users to cause a denial of service (host memory consumption) via vectors related to allocating a new APDU object.
www.openwall.com/lists/oss-security/2017/03/01/11
www.securityfocus.com/bid/96541
access.redhat.com/errata/RHSA-2017:2408
bugzilla.redhat.com/show_bug.cgi?id=1427833
cgit.freedesktop.org/spice/libcacard/commit/?id=9113dc6a303604a2d9812ac70c17d076ef11886c
cgit.freedesktop.org/spice/libcacard/tree/NEWS?id=aaa5251791bf0b1640afcba77a7d79ea23c42d53