# CVE-2022-36561: Null dereference in n/a

> A segmentation violation in XPDF allows attackers to cause a denial of service via a crafted PDF file.

- **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:** 30 Aug 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-4jvg-7p7h-vmpq, UBUNTU-CVE-2022-36561

## What is CVE-2022-36561?

CVE-2022-36561 is a medium-severity vulnerability in Xpdfreader Xpdf, published on 30 Aug 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

XPDF v4.0.4 was discovered to contain a segmentation violation via the component /xpdf/AcroForm.cc:538.

## Which versions are affected by CVE-2022-36561?

It affects 1 product.


Products: Xpdfreader Xpdf.

## How do I fix CVE-2022-36561?

Upgrade to a fixed version.

## Is CVE-2022-36561 being exploited?

There is no known exploitation of CVE-2022-36561 in the wild and no public exploit code.

## Other vulnerabilities in Xpdfreader Xpdf

- [CVE-2022-38928](https://insights.sbomify.com/CVE-2022-38928/): Null dereference in n/a (high 7.8)
- [CVE-2022-38222](https://insights.sbomify.com/CVE-2022-38222/): Use after free in n/a (high 7.8)
- [CVE-2022-33108](https://insights.sbomify.com/CVE-2022-33108/): Memory corruption in n/a (high 7.8)
- [CVE-2022-30524](https://insights.sbomify.com/CVE-2022-30524/): Memory corruption in n/a (high 7.8)
- [CVE-2020-24996](https://insights.sbomify.com/CVE-2020-24996/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-36561 and fix it if it is affected.

What it is: CVE-2022-36561 is a medium-severity vulnerability in Xpdfreader Xpdf, published on 30 Aug 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-2022-36561 in the wild and no public exploit code.

Affected product: Xpdfreader Xpdf. 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-2022-36561/ (Markdown: https://insights.sbomify.com/CVE-2022-36561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-36561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-36561
- OSV: https://osv.dev/vulnerability/CVE-2022-36561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-36561/
Summaries are generated and may contain mistakes; the official description above is the record.