CVE-2025-5204

A vulnerability classified as problematic has been found in Open Asset Import Library Assimp 5.4.3. This affects the function MDLImporter::ParseSkinLump3DGSMDL7 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.

Database specific

{
    "cna_assigner": "VulDB",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/5xxx/CVE-2025-5204.json",
    "cwe_ids": [
        "CWE-119",
        "CWE-125"
    ]
}

References

Affected packages

Git / github.com/assimp/assimp

Affected ranges

Type

GIT

Repo

https://github.com/assimp/assimp

Events

Introduced

c35200e38ea8f058812b83de2ef32c6093b0ece2

Fixed

c35200e38ea8f058812b83de2ef32c6093b0ece2

Database specific

{
    "cpe": "cpe:2.3:a:assimp:assimp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.4.3"
        },
        {
            "last_affected": "5.4.3"
        },
        {
            "introduced": "0"
        },
        {
            "fixed": "5.4.3"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

5.*

5.4.3

Database specific

vanir_signatures

[
    {
        "id": "CVE-2025-5204-20a4c35d",
        "source": "https://github.com/assimp/assimp/commit/c35200e38ea8f058812b83de2ef32c6093b0ece2",
        "signature_type": "Line",
        "target": {
            "file": "test/unit/utVersion.cpp"
        },
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "14751536908339836394842576333578963310",
                "250465586554798767444559000961914664081",
                "237443928289347941562880826078082366790",
                "259836610294362557380643058981394434250"
            ],
            "threshold": 0.9
        },
        "deprecated": false
    },
    {
        "id": "CVE-2025-5204-cea7f02c",
        "source": "https://github.com/assimp/assimp/commit/c35200e38ea8f058812b83de2ef32c6093b0ece2",
        "signature_type": "Function",
        "target": {
            "file": "test/unit/utVersion.cpp",
            "function": "TEST_F"
        },
        "signature_version": "v1",
        "digest": {
            "function_hash": "122993617034958603430649906656648264306",
            "length": 63.0
        },
        "deprecated": false
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-5204.json"

vanir_signatures_modified

"2026-07-09T14:14:48Z"