# CVE-2018-19134: Memory corruption in n/a

> A type confusion vulnerability in Ghostscript allows attackers to execute arbitrary code or cause a denial of service via a crafted PostScript document.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 20 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-19134, GHSA-r77j-73rg-4f8h, UBUNTU-CVE-2018-19134

## What is CVE-2018-19134?

CVE-2018-19134 is a high-severity memory corruption vulnerability in Artifex Ghostscript, published on 20 Dec 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-704 (Incorrect Type Conversion or Cast)

## Which versions are affected by CVE-2018-19134?

It affects 7 products.


Products: Artifex Ghostscript, Debian Debian Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2018-19134?

Upgrade to a fixed version.

## Is CVE-2018-19134 being exploited?

There is no known exploitation of CVE-2018-19134 in the wild and no public exploit code.

## Other vulnerabilities in Artifex Ghostscript

- [CVE-2017-8291](https://insights.sbomify.com/CVE-2017-8291/): Artifex Ghostscript Type Confusion (high 7.8, exploited in the wild)
- [CVE-2021-3781](https://insights.sbomify.com/CVE-2021-3781/): Command injection in ghostscript (critical 9.9)
- [CVE-2025-27831](https://insights.sbomify.com/CVE-2025-27831/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-27832](https://insights.sbomify.com/CVE-2025-27832/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-27836](https://insights.sbomify.com/CVE-2025-27836/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-19134 and fix it if it is affected.

What it is: CVE-2018-19134 is a high-severity memory corruption vulnerability in Artifex Ghostscript, published on 20 Dec 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-19134 in the wild and no public exploit code.

Affected product: Artifex Ghostscript. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-19134/ (Markdown: https://insights.sbomify.com/CVE-2018-19134/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-19134
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-19134
- OSV: https://osv.dev/vulnerability/CVE-2018-19134

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-19134/
Summaries are generated and may contain mistakes; the official description above is the record.