CVE-2026-103531 PUBLISHED

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.

• zzxzzb (VulDB User) reporter

• VDB-412343 | OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow
• VDB-412343 | CTI Indicators (IOB, IOC, IOA)
• CVE-2026-103531 | CVE Analysis and Report
• Submit #956910 | OpenSC >= 0.12.2 up to and including 0.27.1 (latest release, unfixed; fix approved in PR #3812, pending merge) Buffer Overflow (stack, CWE-121)
• https://github.com/OpenSC/OpenSC/pull/3812
• https://github.com/OpenSC/OpenSC/commit/ad730304052937c32b4eb489a06835ac6123632c
• https://github.com/OpenSC/OpenSC/

• Stack-based Buffer Overflow CWE
• Memory Corruption CWE