# CVE-2025-5204: Open Asset Import Library Assimp MDLMaterialLoader.cpp ParseSkinLump_3DGS_MDL7 out-of-bounds

> A local attacker can trigger an out-of-bounds read in Assimp's MDL parser, potentially causing crashes or leaking memory contents.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 May 2025
- **Updated:** 28 May 2025
- **Also known as:** DEBIAN-CVE-2025-5204, GHSA-xpvq-w32j-6px4, JLSEC-2026-195, UBUNTU-CVE-2025-5204

## What is CVE-2025-5204?

CVE-2025-5204 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 26 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability classified as problematic has been found in Open Asset Import Library Assimp 5.4.3. This affects the function MDLImporter::ParseSkinLump_3DGS_MDL7 of the file assimp/code/AssetLib/MDL/MDLMaterialLoader.cpp. The manipulation leads to out-of-bounds read. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.

Weakness: CWE-125 (Out-of-bounds Read), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-5204?

It affects 1 product.


Products: Assimp Assimp.

## How do I fix CVE-2025-5204?

No fix published yet.

## Is CVE-2025-5204 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5204 exists.

## Other vulnerabilities in Open Asset Import Library Assimp

- [CVE-2022-45748](https://insights.sbomify.com/CVE-2022-45748/): Use after free in n/a (high 8.8)
- [CVE-2024-48423](https://insights.sbomify.com/CVE-2024-48423/): Use after free in n/a (high 8.4)
- [CVE-2024-45679](https://insights.sbomify.com/CVE-2024-45679/): Memory corruption in Assimp (high 8.4)
- [CVE-2024-40724](https://insights.sbomify.com/CVE-2024-40724/): Memory corruption in Assimp (high 8.4)
- [CVE-2022-38528](https://insights.sbomify.com/CVE-2022-38528/): Null dereference in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-5204 and fix it if it is affected.

What it is: CVE-2025-5204 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 26 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5204 exists.

Affected product: Open Asset Import Library Assimp. 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-2025-5204/ (Markdown: https://insights.sbomify.com/CVE-2025-5204/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5204
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5204
- OSV: https://osv.dev/vulnerability/CVE-2025-5204

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5204/
Summaries are generated and may contain mistakes; the official description above is the record.