CVE-2026-40528
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.
- Score
- CVSS 3.1 7.8 High
- Status
- Analyzed - disclosure@vulncheck.com
- Published
- 2026-05-29
- Last modified
- 2026-07-14
- Weaknesses
- CWE-121, CWE-122
Affected products
References
- https://github.com/OpenSC/OpenSC/commit/0358817ec74aeca654f83e7709c7720b14c5db59
- https://www.vulncheck.com/advisories/opensc-buffer-overrun-in-do-key-value-via-profile-c
