---
id: CVE-2023-5992
title: 'Opensc: side-channel leaks while stripping encryption pkcs#1 padding'
summary: >-
  A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is
  not implemented as side-channel resistant. This issue may result in the
  potential leak of private data.
severity: medium
cvss: 5.6
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-203
vendor: Red Hat
product: opensc
affected:
  - opensc (all versions)
  - opensc (all versions)
  - opensc (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-05-02T13:54:54.249985Z'
published: '2024-01-31'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T11:36:31.126Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-5992'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:0966'
    label: 'RHSA-2024:0966'
  - url: 'https://access.redhat.com/errata/RHSA-2024:0967'
    label: 'RHSA-2024:0967'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-5992'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2248685'
    label: RHBZ#2248685
  - url: 'https://github.com/OpenSC/OpenSC/wiki/CVE-2023-5992'
  - url: 'https://www.usenix.org/system/files/usenixsecurity24-shagam.pdf'
tags:
  - cve.org
epss: 0.01156
epssPercentile: 0.67192
ingestedAt: '2026-11-05T21:36:00.802Z'
---

## Overview

A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.

## Affected

- `opensc (all versions)`
- `opensc (all versions)`
- `opensc (all versions)`

## Remediation

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