---
title: "CVE-2018-8885\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-2018-8885?format=md
keywords: index, follow
---

# CVE-2018-8885

Publication date 26 March 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.0 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-8885?format=md#impact-score)

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## Description

screenresolution-mechanism in screen-resolution-extra 0.17.2 does not
properly use the PolicyKit D-Bus API, which allows local users to bypass
intended access restrictions by leveraging a race condition via a setuid or
pkexec process that is mishandled in a PolicyKitService.\_check\_permission
call.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| screen-resolution-extra | 17.10 artful | Fixed 0.17.1.1 |
| 16.04 LTS xenial | Fixed 0.17.1.1~16.04.1 |
| 14.04 LTS trusty | Fixed 0.17.1.1~14.04.1 |

---

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

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.0 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.0 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8885)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-8885)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-8885)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-8885)

### Related Ubuntu Security Notices (USN)

+ [USN-3607-1](https://usn.ubuntu.com/USN-3607-1)
+ Screen Resolution Extra vulnerability
+ 26 March 2018

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2018-8885>