OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzzpkcs15reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, scpkcs15pubkeyfromspki_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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66037.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-125"
]
}