CVE-2026-40528
OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c
- State
- Published
- Severity
- 1.0 Low
- Published
- May 29, 2026
- Updated
- Jul 14, 2026
- Reserved
- Apr 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 1.0 Low | CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.8 Low | CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
OpenSCOpenSC |
|
References
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