Stack-based buffer overflow in OpenSC - CVE-2025-49010
Published: April 2, 2026
Vulnerability identifier: #VU124848
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-2025-49010
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 disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to a stack-based buffer overflow write in the GET RESPONSE handling in libopensc when processing specially crafted responses to APDU requests from a crafted USB device or smart card. An attacker with physical access can present a crafted USB device or smart card to trigger the overflow and disclose sensitive information, modify data, or cause a denial of service.
User interaction is required while a user or administrator is using a token, and the issue is considered high complexity.
How to mitigate CVE-2025-49010
Install security update from vendor's website.