A double free when handling responses from a smartcard in sc_file_set_sec_attr in libopensc/sc.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Exploitability
AV:PAC:LPR:LUI:NScope
S:UImpact
C:HI:HA:H6.6/CVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H