CVE-2025-66037

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.

PUBLISHED Reserved 2025-11-21 | Published 2026-03-30 | Updated 2026-03-30 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

Product status

References

github.com/...OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx

github.com/OpenSC/OpenSC/wiki/CVE-2025-66037

cve.org (CVE-2025-66037)

nvd.nist.gov (CVE-2025-66037)

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