Vulnerability Description
OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configuration file. During pkcs15-init invocation, a key value entry beginning with '=' followed by more than sizeof(keybuf) characters is copied into keybuf via memcpy without a length check, causing both stack and heap buffer overruns.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Opensc Project | Opensc | < 0.27.0 |
Related Weaknesses (CWE)
References
- https://github.com/OpenSC/OpenSC/commit/0358817ec74aeca654f83e7709c7720b14c5db59Patch
- https://www.vulncheck.com/advisories/opensc-buffer-overrun-in-do-key-value-via-pThird Party Advisory
FAQ
What is CVE-2026-40528?
CVE-2026-40528 is a vulnerability with a CVSS score of 3.8 (LOW). OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory...
How severe is CVE-2026-40528?
CVE-2026-40528 has been rated LOW with a CVSS base score of 3.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40528?
Check the references section above for vendor advisories and patch information. Affected products include: Opensc Project Opensc.