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

Quick assessment

Affected
n/a OpenSC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 OpenSC 0.27.1 及更早版本中发现了一个漏洞。受影响的组件是文件 中的函数 。对参数 进行特定操作可能导致基于栈的缓冲区溢出。该攻击可远程发起。修复此问题的补丁编号为 。建议应用该补丁以解决此问题，这是最佳实践。

CVSS 5.5 · Medium
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I. Basic Information for CVE-2026-103531

Vulnerability Information
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Vulnerability Title
OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- OpenSC 0.27.0 cpe:2.3:a:opensc:opensc:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-103531

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III. Intelligence Information for CVE-2026-103531

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Other References for CVE-2026-103531 (5)

IV. Related Vulnerabilities

Same product: OpenSC
Same vendor: n/a
Same weakness: CWE-121

V. Comments for CVE-2026-103531

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