OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.
Exploitability
AV:PAC:HPR:NUI:NScope
S:UImpact
C:LI:LA:L3.9/CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LMemory Safety