CVE-2026-103531

OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow

MEDIUM
5.5
CVSS Score
Published: October 1, 2026 at 12:45 AM UTC
Updated: October 6, 2026 at 01:16 AM UTC
1 product affected across 1 vendorOpenSC

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-119CWE-121

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