Out-of-bounds Read in Opensc
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…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (1.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Opensc — versions < 0.27.0
Weakness classification (CWE)
References
- https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx (x_refsource_CONFIRM)
- https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-66037?
- CVE-2025-66037 is a low-severity vulnerability in Opensc, classified under Out-of-bounds Read. CVSS score: 3.9/10. Published 2026-03-30.
- How severe is CVE-2025-66037?
- Low severity. CVSS v3 base score is 3.9 out of 10.