Medium 5.5Published Oct 1, 2026

CVE-2026-103531OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects n/a OpenSC. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
Weakness (CWE): CWE-121, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Oct 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a OpenSC opensc:opensc	0.27.0; 0.27.1	CNA record

References

https://vuldb.com/vuln/412343vdb-entry, technical-description
https://vuldb.com/vuln/412343/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-103531third-party-advisory
https://vuldb.com/submit/956910third-party-advisory
https://github.com/OpenSC/OpenSC/pull/3812issue-tracking, patch
https://github.com/OpenSC/OpenSC/commit/ad730304052937c32b4eb489a06835ac6123632cpatch
https://github.com/OpenSC/OpenSC/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.