Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 0.3%
CVSS Severity
CVSS v3 Score 3.8
References
Products affected by CVE-2026-40528
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cpe:2.3:a:opensc_project:opensc:-
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cpe:2.3:a:opensc_project:opensc:0.12.2
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cpe:2.3:a:opensc_project:opensc:0.13.0
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cpe:2.3:a:opensc_project:opensc:0.14.0
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cpe:2.3:a:opensc_project:opensc:0.15.0
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cpe:2.3:a:opensc_project:opensc:0.16.0
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cpe:2.3:a:opensc_project:opensc:0.17.0
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cpe:2.3:a:opensc_project:opensc:0.18.0
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cpe:2.3:a:opensc_project:opensc:0.19.0
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cpe:2.3:a:opensc_project:opensc:0.2.0
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cpe:2.3:a:opensc_project:opensc:0.20.0
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cpe:2.3:a:opensc_project:opensc:0.21.0
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cpe:2.3:a:opensc_project:opensc:0.22.0
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cpe:2.3:a:opensc_project:opensc:0.23.0
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cpe:2.3:a:opensc_project:opensc:0.24.0
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cpe:2.3:a:opensc_project:opensc:0.25.0
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cpe:2.3:a:opensc_project:opensc:0.25.1
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cpe:2.3:a:opensc_project:opensc:0.26.0
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cpe:2.3:a:opensc_project:opensc:0.26.1
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cpe:2.3:a:opensc_project:opensc:0.3.0
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cpe:2.3:a:opensc_project:opensc:0.3.1