CVE-2026-103531

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.

CVSS 4.0

5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

5.5CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-121

Published

2026-10-01

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• 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

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