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OpenAdvisories
High ALAS2023-2026-1988 1 CVE

Important: opensc security update (Amazon Linux 2023)

Published Jul 20, 2026 · Updated Jul 20, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: 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.

Fixed packages 3

ReleasePackageFixed in
Amazon Linux · 2023 opensc 0:0.24.0-1.amzn2023.0.6
Amazon Linux · 2023 opensc-debuginfo 0:0.24.0-1.amzn2023.0.6
Amazon Linux · 2023 opensc-debugsource 0:0.24.0-1.amzn2023.0.6

Vulnerabilities 1

  • Low 3.8
    CVE-2026-40528

    OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c

    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 …

    OpenSC OpenSC opensc Azure Linux

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-40528.html