---
title: "CVE-2018-16511\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-2018-16511?format=md
keywords: index, follow
---

# CVE-2018-16511

Publication date 5 September 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-16511?format=md#impact-score)

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## Description

An issue was discovered in Artifex Ghostscript before 9.24. A type
confusion in "ztype" could be used by remote attackers able to supply
crafted PostScript to crash the interpreter or possibly have unspecified
other impact.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ghostscript | 18.04 LTS bionic | Fixed 9.22~dfsg+1-0ubuntu1.2 |
| 16.04 LTS xenial | Fixed 9.18~dfsg~0-0ubuntu2.9 |
| 14.04 LTS trusty | Fixed 9.10~dfsg-0ubuntu10.13 |

---

* [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-2018-16511?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 |
| --- | --- |
| ghostscript | * Upstream:   <http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0edd3d6c634a577db261615a9dc2719bca7f6e01> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16511)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-16511)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-16511)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-16511)

### Related Ubuntu Security Notices (USN)

+ [USN-3768-1](https://usn.ubuntu.com/USN-3768-1)
+ Ghostscript vulnerabilities
+ 19 September 2018

### Other references

* <http://seclists.org/oss-sec/2018/q3/182>
* <https://www.artifex.com/news/ghostscript-security-resolved/>
* <https://www.cve.org/CVERecord?id=CVE-2018-16511>