Bug 2544409 (CVE-2026-103531)

Summary:	CVE-2026-103531 opensc: opensc: Arbitrary code execution via stack-based buffer overflow in card-setcos
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in OpenSC. A stack-based buffer overflow vulnerability exists in the SetCOS smart card driver during the handling of file control information in the setcos_construct_fci_44 function. By supplying manipulated card attributes, an attacker could trigger memory corruption, potentially leading to arbitrary code execution or an application crash resulting in a Denial of Service (DoS).	Story Points:	---
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Last Closed:		Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2544446
Bug Blocks:

Description OSIDB Bzimport 2026-10-01 01:21:49 UTC

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.