🛡️ CVE-2026-40528
🟢 CVSS 3.8 — Low ✅ No Known Exploit CWE-121 NVD
3.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity LOW
CVSS Score 3.8
CVSS Vector CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CWE CWE-121
Public Exploit ✅ No
Source NVD
Published 2026-05-29
Updated 2026-06-04
Modified 2026-06-03

Affected Packages

Software From version Fixed in
opensc — 0.27.0
unknown — —

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