---
title: "CVE-2023-5992\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-5992?format=md
keywords: index, follow
---

# CVE-2023-5992

Publication date 31 January 2024

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.6 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2023-5992?format=md#impact-score)

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## Description

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.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2023-5992?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| opensc | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 0.22.0-1ubuntu2+esm1  Ubuntu Pro |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Ignored end of standard support |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

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## Notes

---

### [bruce](https://launchpad.net/~bruce)

Noble has been patched however there was a regression in this patch.
This is fixed by https://github.com/OpenSC/OpenSC/pull/3077

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.6 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | Low |
  | Integrity impact | Low |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.6 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5992)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-5992)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-5992)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-5992)

### Related Ubuntu Security Notices (USN)

+ [USN-7346-1](https://usn.ubuntu.com/USN-7346-1)
+ OpenSC vulnerabilities
+ 12 March 2025

### Other references

* <https://bugzilla.redhat.com/show_bug.cgi?id=2248685>
* <https://www.cve.org/CVERecord?id=CVE-2023-5992>