---
id: CVE-2023-40661
title: 'Opensc: multiple memory issues with pkcs15-init (enrollment tool)'
summary: >-
  Several memory vulnerabilities were identified within the OpenSC packages,
  particularly in the card enrollment process using pkcs15-init when a user or
  administrator enrolls cards. To take advantage of these flaws, an attacker
  must have …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-119
vendor: Red Hat
product: OpenSC
affected:
  - OpenSC < 0.24.0
  - opensc (all versions)
  - opensc (all versions)
  - opensc
published: '2023-11-06'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T20:26:32.692Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-40661'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:7876'
    label: 'RHSA-2023:7876'
  - url: 'https://access.redhat.com/errata/RHSA-2023:7879'
    label: 'RHSA-2023:7879'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-40661'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2240913'
    label: RHBZ#2240913
  - url: 'https://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651'
  - url: 'https://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1'
  - url: 'https://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories'
tags:
  - cve.org
epss: 0.01318
epssPercentile: 0.70953
ingestedAt: '2026-11-06T21:04:04.249Z'
---

## Overview

Several memory vulnerabilities were identified within the OpenSC packages, particularly in the card enrollment process using pkcs15-init when a user or administrator enrolls cards. To take advantage of these flaws, an attacker must have physical access to the computer system and employ a custom-crafted USB device or smart card to manipulate responses to APDUs. This manipulation can potentially allow 
compromise key generation, certificate loading, and other card management operations during enrollment.

## Affected

- `OpenSC < 0.24.0`
- `opensc (all versions)`
- `opensc (all versions)`
- `opensc`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.