---
title: "CVE-2022-4121\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-2022-4121?format=md
keywords: index, follow
---

# CVE-2022-4121

Publication date 17 January 2023

Last updated 15 September 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2022-4121?format=md#impact-score)

Toggle side navigation

## Description

In libetpan a null pointer dereference in mailimap\_mailbox\_data\_status\_free
in low-level/imap/mailimap\_types.c was found that could lead to a remote
denial of service or other potential consequences.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2022-4121?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libetpan | 25.04 plucky | Not affected |
| 24.10 oracular | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of life, was needs-triage |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 1.9.4-3+deb11u1build0.22.04.1 |
| 20.04 LTS focal | Fixed 1.9.4-2ubuntu0.1~esm1  Ubuntu Pro |
| 18.04 LTS bionic | Fixed 1.8.0-1ubuntu0.1~esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 1.6-1ubuntu0.1+esm1  Ubuntu Pro |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2022-4121?format=md#patch-details)

### Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

[Get Ubuntu Pro](https://ubuntu.com/pro)
[30-day free trial](https://ubuntu.com/pro/free-trial)

## Notes

---

### [ej7367](https://launchpad.net/~ej7367)

Fixed in 1.9.4-3+deb11u1.

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| libetpan | * Upstream:   [5c9eb6b](https://github.com/dinhvh/libetpan/commit/5c9eb6b6ba64c4eb927d7a902317410181aacbba) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-4121)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-4121)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-4121)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-4121)

### Related Ubuntu Security Notices (USN)

+ [USN-7740-1](https://usn.ubuntu.com/USN-7740-1)
+ LibEtPan vulnerability
+ 8 September 2025

### Other references

* <https://github.com/dinhvh/libetpan/issues/420>
* <https://www.cve.org/CVERecord?id=CVE-2022-4121>