# CVE-2018-19134: ghostscript: In Artifex Ghostscript through 9.25, the setpattern operator did not properly validate certain types

CVE-2018-19134 is fixed in 4 products on 1 platform, first by ghostscript 9.26~dfsg+0-0ubuntu0.18.04.1, released January 2, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-19134
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0287
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 20, 2018

## Description

In Artifex Ghostscript through 9.25, the setpattern operator did not properly validate certain types. A specially crafted PostScript document could exploit this to crash Ghostscript or, possibly, execute arbitrary code in the context of the Ghostscript process. This is a type confusion issue because of failure to check whether the Implementation of a pattern dictionary was a structure type.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ghostscript Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.1 | [ghostscript 9.26~dfsg+0-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ghostscript-9.26-dfsg-0-0ubuntu0.18.04.1.md) | Jan 2, 2019 |
| Linux | ghostscript-x Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.1 | [ghostscript-x 9.26~dfsg+0-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ghostscript-x-9.26-dfsg-0-0ubuntu0.18.04.1.md) | Jan 2, 2019 |
| Linux | libgs9 Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.1 | [libgs9 9.26~dfsg+0-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgs9-9.26-dfsg-0-0ubuntu0.18.04.1.md) | Jan 2, 2019 |
| Linux | libgs9-common Ubuntu 18.04.6 LTS (bionic) | 9.26~dfsg+0-0ubuntu0.18.04.1 | [libgs9-common 9.26~dfsg+0-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgs9-common-9.26-dfsg-0-0ubuntu0.18.04.1.md) | Jan 2, 2019 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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