---
title: "CVE-2022-23478\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-2022-23478?format=md
keywords: index, follow
---

# CVE-2022-23478

Publication date 9 December 2022

Last updated 4 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.1 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2022-23478?format=md#impact-score)

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## Description

xrdp is an open source project which provides a graphical login to remote
machines using Microsoft Remote Desktop Protocol (RDP).
xrdp < v0.9.21 contain a Out of Bound Write in
xrdp\_mm\_trans\_process\_drdynvc\_channel\_open() function. There are no known
workarounds for this issue. Users are advised to upgrade.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xrdp | 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 | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 0.9.17-2ubuntu2+esm1  Ubuntu Pro |
| 20.04 LTS focal | Fixed 0.9.12-1ubuntu0.1+esm1  Ubuntu Pro |
| 18.04 LTS bionic | Not affected |
| 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)

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.1 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.1 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23478)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-23478)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-23478)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-23478)

### Related Ubuntu Security Notices (USN)

+ [USN-6474-1](https://usn.ubuntu.com/USN-6474-1)
+ xrdp vulnerabilities
+ 8 November 2023

### Other references

* <https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-2f49-wwpm-78pj>
* <https://www.cve.org/CVERecord?id=CVE-2022-23478>