Vulnerability 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 Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Opensc Project | Opensc | < 0.27.0 |
Related Weaknesses (CWE)
References
- https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfxExploitVendor Advisory
- https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037Vendor Advisory
FAQ
What is CVE-2025-66037?
CVE-2025-66037 is a vulnerability with a CVSS score of 3.9 (LOW). 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 ...
How severe is CVE-2025-66037?
CVE-2025-66037 has been rated LOW with a CVSS base score of 3.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66037?
Check the references section above for vendor advisories and patch information. Affected products include: Opensc Project Opensc.