# CVE-2023-39355: FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS

> A use-after-free vulnerability in FreeRDP allows attackers to cause a denial of service via crafted RDPGFX packets.

- **Severity:** High 7.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 31 Aug 2023
- **Updated:** 13 Feb 2025
- **Also known as:** GHSA-hvwj-vmg6-2f5h

## What is CVE-2023-39355?

CVE-2023-39355 is a high-severity use after free vulnerability in Debian Debian Linux, published on 31 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Versions of FreeRDP on the 3.x release branch before beta3 are subject to a Use-After-Free in processing `RDPGFX_CMDID_RESETGRAPHICS` packets. If `context->maxPlaneSize` is 0, `context->planesBuffer` will be freed. However, without updating `context->planesBuffer`, this leads to a Use-After-Free exploit vector. In most environments this should only result in a crash. This issue has been addressed in version 3.0.0-beta3 and users of the beta 3.x releases are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2023-39355?

It affects 2 products.


Products: Debian Debian Linux, Freerdp Freerdp.

## How do I fix CVE-2023-39355?

Upgrade to a fixed version.

## Is CVE-2023-39355 being exploited?

There is no known exploitation of CVE-2023-39355 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39355 and fix it if it is affected.

What it is: CVE-2023-39355 is a high-severity use after free vulnerability in Debian Debian Linux, published on 31 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-39355 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-2023-39355/ (Markdown: https://insights.sbomify.com/CVE-2023-39355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39355
- OSV: https://osv.dev/vulnerability/CVE-2023-39355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39355/
Summaries are generated and may contain mistakes; the official description above is the record.