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CVSS v3.1
3.9
EPSS
0.25%
Published
Mar 30, 2026
Modified
Apr 1, 2026
Public PoC / Exploit (1)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
Description
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.
CVSS Vector
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LWeaknesses (CWE)
Affected Products (1)
References (2)