PT-2026-44841 · Opensc · Opensc

Nicholas Carlini · Published 2026-05-29 · Updated 2026-05-29 · CVE-2026-40528

Positive Technologies (AI Summary)

CVSS v3.1

3.8

Low

Base vector

AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions OpenSC versions prior to 0.27.0

Description A stack and heap buffer overrun occurs in the do key value() function within src/pkcs15init/profile.c. This issue allows memory corruption when a crafted profile configuration file is supplied. During the invocation of pkcs15-init, a key value entry starting with '=' followed by more than the size of keybuf is copied into keybuf using memcpy without a length check.

Recommendations Update to version 0.27.0 or apply the fix from commit 0358817.

Fix

Heap Based Buffer Overflow

Stack Overflow

Weakness Enumeration

CWE-122

CWE-121

Related Identifiers

CVE-2026-40528

Affected Products

Opensc

References · 4

• https://github.com/OpenSC/OpenSC/commit/0358817ec74aeca654f83e7709c7720b14c5db59 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-40528 · Security Note
• https://vulncheck.com/advisories/opensc-buffer-overrun-in-do-key-value-via-profile-c · Note
• https://t.me/CVEtracker/55264 · Telegram Post