# CVE-2016-8674: Use after free in n/a

> Remote attackers can cause a denial of service via a crafted file due to a use-after-free vulnerability in the MuPDF library.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:** 15 Feb 2017
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-8674, GHSA-pcg9-j72p-9gjp, UBUNTU-CVE-2016-8674

## What is CVE-2016-8674?

CVE-2016-8674 is a medium-severity use after free vulnerability in Artifex Mupdf, published on 15 Feb 2017. 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

The pdf_to_num function in pdf-object.c in MuPDF before 1.10 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted file.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2016-8674?

It affects 1 product.


Products: Artifex Mupdf.

## How do I fix CVE-2016-8674?

Upgrade to a fixed version.

## Is CVE-2016-8674 being exploited?

There is no known exploitation of CVE-2016-8674 in the wild and no public exploit code.

## Other vulnerabilities in Artifex Mupdf

- [CVE-2019-7321](https://insights.sbomify.com/CVE-2019-7321/): Memory corruption in n/a (critical 9.8)
- [CVE-2016-6525](https://insights.sbomify.com/CVE-2016-6525/): Memory corruption in n/a (critical 9.8)
- [CVE-2011-0341](https://insights.sbomify.com/CVE-2011-0341/): Memory corruption in n/a (critical 9.3)
- [CVE-2016-8728](https://insights.sbomify.com/CVE-2016-8728/): Memory corruption in MuPDF (high 8.6)
- [CVE-2021-3407](https://insights.sbomify.com/CVE-2021-3407/): Use after free in mupdf (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-8674 and fix it if it is affected.

What it is: CVE-2016-8674 is a medium-severity use after free vulnerability in Artifex Mupdf, published on 15 Feb 2017. 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-2016-8674 in the wild and no public exploit code.

Affected product: Artifex Mupdf. 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-2016-8674/ (Markdown: https://insights.sbomify.com/CVE-2016-8674/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-8674
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-8674
- OSV: https://osv.dev/vulnerability/CVE-2016-8674

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-8674/
Summaries are generated and may contain mistakes; the official description above is the record.