Vulnerability record · CVE-2026-103531 · published 1 October 2026

CVE-2026-103531: Memory buffer overflow vulnerability

A flaw has been found in OpenSC up to 0.27.1. The impacted element is the function setcos_construct_fci_44 of the file src/libopensc/card-setcos.c. Executing a manipulation of the argument type_attr can lead to stack-based buffer overflow. The attack can be launched remotely. This patch is called ad730304052937c32b4eb489a06835ac6123632c. It is best practice to apply a patch to resolve this issue.

5.1 CVSS 4.0 Medium CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow Deferred

5.1CVSS 4.0 base score, v2 6.5

-EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

7References

1 Oct 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/OpenSC/OpenSC/
https://github.com/OpenSC/OpenSC/commit/ad730304052937c32b4eb489a06835ac6123632c
https://github.com/OpenSC/OpenSC/pull/3812
https://vuldb.com/cve/CVE-2026-103531
https://vuldb.com/submit/956910
https://vuldb.com/vuln/412343
https://vuldb.com/vuln/412343/cti

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Source: NIST National Vulnerability Database (record CVE-2026-103531), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.