# CVE-2022-39320: Heap buffer overflow in urbdrc channel

> A heap buffer overflow in FreeRDP allows a malicious server to read out-of-bounds data from the client, potentially leading to information disclosure or code execution.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 16 Nov 2022
- **Updated:** 3 Nov 2025
- **Also known as:** CLEANSTART-2024-MD30847, DEBIAN-CVE-2022-39320, GHSA-qfq2-82qr-7f4j, UBUNTU-CVE-2022-39320

## What is CVE-2022-39320?

CVE-2022-39320 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 16 Nov 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

FreeRDP is a free remote desktop protocol library and clients. Affected versions of FreeRDP may attempt integer addition on too narrow types leads to allocation of a buffer too small holding the data written. A malicious server can trick a FreeRDP based client to read out of bound data and send it back to the server. This issue has been addressed in version 2.9.0 and all users are advised to upgrade. Users unable to upgrade should not use the `/usb` redirection switch.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2022-39320?

It affects 2 products.


Products: Fedoraproject Fedora, Freerdp Freerdp.

## How do I fix CVE-2022-39320?

Upgrade to a fixed version.

## Is CVE-2022-39320 being exploited?

There is no known exploitation of CVE-2022-39320 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-39320 and fix it if it is affected.

What it is: CVE-2022-39320 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 16 Nov 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-39320 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2022-39320/ (Markdown: https://insights.sbomify.com/CVE-2022-39320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-39320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-39320
- OSV: https://osv.dev/vulnerability/CVE-2022-39320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-39320/
Summaries are generated and may contain mistakes; the official description above is the record.