PT-2026-29081 · Opensc · Opensc

Published 2026-03-30 · Updated 2026-03-30 · CVE-2025-66037

Mitre

CVSS v3.1

3.9

Low

AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2025-66037

Affected Products

Opensc

References · 3

• 🔥 https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-66037 · Security Note
• https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx · Note