CVE-2026-103531

OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow

CVE-2026-103531 is fixed in opensc on 1 platform by DEBIAN-CVE-2026-103531 (version 0.27.1-3), released October 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0019
9th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
opensc · Debian 14 0.27.1-3 DEBIAN-CVE-2026-103531 Oct 10, 2026

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