Vulnerability Details CVE-2025-66037
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.3%
CVSS Severity
CVSS v3 Score 3.9
References
Products affected by CVE-2025-66037
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cpe:2.3:a:opensc_project:opensc:0.12.2
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cpe:2.3:a:opensc_project:opensc:0.13.0
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cpe:2.3:a:opensc_project:opensc:0.14.0
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cpe:2.3:a:opensc_project:opensc:0.15.0
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cpe:2.3:a:opensc_project:opensc:0.16.0
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cpe:2.3:a:opensc_project:opensc:0.17.0
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cpe:2.3:a:opensc_project:opensc:0.18.0
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cpe:2.3:a:opensc_project:opensc:0.19.0
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cpe:2.3:a:opensc_project:opensc:0.2.0
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cpe:2.3:a:opensc_project:opensc:0.20.0
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cpe:2.3:a:opensc_project:opensc:0.21.0
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cpe:2.3:a:opensc_project:opensc:0.22.0
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cpe:2.3:a:opensc_project:opensc:0.23.0
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cpe:2.3:a:opensc_project:opensc:0.24.0
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cpe:2.3:a:opensc_project:opensc:0.3.0
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cpe:2.3:a:opensc_project:opensc:0.3.1