Stack-based buffer overflow in OpenSC - CVE-2025-66215
Published: April 2, 2026
Vulnerability identifier: #VU124850
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-66215
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: OpenSC
Affected software:
OpenSC
OpenSC
Detailed vulnerability description
The vulnerability allows an attacker with physical access to corrupt memory.
The vulnerability exists due to stack-based buffer overflow in the card-oberthur driver when processing specially crafted responses to APDUs from a crafted USB device or smart card. An attacker with physical access can present a crafted USB device or smart card to corrupt memory.
User interaction is required while a user or administrator uses a token, and the issue affects the oberthur card driver in libopensc.
How to mitigate CVE-2025-66215
Install security update from vendor's website.