# CVE-2022-30975: Null dereference in n/a

> A NULL pointer dereference in the MuJS JavaScript engine allows attackers to cause a denial of service via crafted input.

- **Severity:** Medium 5.5 (`CVSS:3.1/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:** 18 May 2022
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-30975, GHSA-cwrv-3m9h-vr76, UBUNTU-CVE-2022-30975

## What is CVE-2022-30975?

CVE-2022-30975 is a medium-severity vulnerability in Debian Debian Linux, published on 18 May 2022. 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 MuJS through 1.2.0, jsP_dumpsyntax in jsdump.c has a NULL pointer dereference, as demonstrated by mujs-pp.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2022-30975?

It affects 3 products.


Products: Artifex Mujs, Debian Debian Linux, Fedoraproject Fedora.

## How do I fix CVE-2022-30975?

Upgrade to a fixed version.

## Is CVE-2022-30975 being exploited?

There is no known exploitation of CVE-2022-30975 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2021-33796](https://insights.sbomify.com/CVE-2021-33796/): Use after free in MuJS (critical 10.0)
- [CVE-2021-33797](https://insights.sbomify.com/CVE-2021-33797/): Integer overflow in mujs (critical 9.8)
- [CVE-2021-45005](https://insights.sbomify.com/CVE-2021-45005/): Memory corruption in n/a (critical 9.8)
- [CVE-2019-12798](https://insights.sbomify.com/CVE-2019-12798/): Integer overflow in n/a (critical 9.8)
- [CVE-2019-11411](https://insights.sbomify.com/CVE-2019-11411/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-30975 and fix it if it is affected.

What it is: CVE-2022-30975 is a medium-severity vulnerability in Debian Debian Linux, published on 18 May 2022. 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-2022-30975 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2022-30975/ (Markdown: https://insights.sbomify.com/CVE-2022-30975/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-30975
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-30975
- OSV: https://osv.dev/vulnerability/CVE-2022-30975

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-30975/
Summaries are generated and may contain mistakes; the official description above is the record.