What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-05-26 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Open Asset Import Library Assimp: before 5.4.3 — fixed in 5.4.3

How to fix

Upgrade to a fixed version: Open Asset Import Library Assimp 5.4.3. Check the vendor advisory for mitigations.

References

• https://github.com/assimp/assimp/issues/6128
• https://github.com/assimp/assimp/issues/6176
• https://github.com/user-attachments/files/20209911/ParseSkinLump-reproducer.zip
• https://vuldb.com/?ctiid.310293
• https://vuldb.com/?id.310293
• https://vuldb.com/?submit.578013
• https://github.com/assimp/assimp/issues/6176

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