---
title: "CVE-2022-3559\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-2022-3559?format=md
keywords: index, follow
---

# CVE-2022-3559

Publication date 17 October 2022

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2022-3559?format=md#impact-score)

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## Description

A vulnerability was found in Exim and classified as problematic. This issue
affects some unknown processing of the component Regex Handler. The
manipulation leads to use after free. The name of the patch is
4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a
patch to fix this issue. The identifier VDB-211073 was assigned to this
vulnerability.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| exim4 | 22.10 kinetic | Fixed 4.96-3ubuntu1.1 |
| 22.04 LTS jammy | Fixed 4.95-4ubuntu2.2 |
| 20.04 LTS focal | Fixed 4.93-13ubuntu1.7 |
| 18.04 LTS bionic | Fixed 4.90.1-1ubuntu1.10 |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [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-2022-3559?format=md#patch-details)

### 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 |
| --- | --- |
| exim4 | * Upstream:   [4e9ed49](https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3559)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-3559)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-3559)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-3559)

### Related Ubuntu Security Notices (USN)

+ [USN-5741-1](https://usn.ubuntu.com/USN-5741-1)
+ Exim vulnerability
+ 24 November 2022

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2022-3559>