| Title | Assimp commit 17c12da Heap-based Buffer Overflow |
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| Description | A heap-buffer-overflow vulnerability exists in Assimp's 3DGS MDL7 model output mesh generator within theAssimp::MDLImporter::GenerateOutputMeshes_3DGS_MDL7() function at MDLLoader.cpp:1944. The flaw is caused by insufficient array boundary checking during bone data initialization. The program allocates the`pcMesh->mBones` bone array with a fixed size based on the declared bone count, yet iterates and increments the loop index without validating the maximum accessible array index. Processing a maliciously crafted MDL7 file can make the loop index exceed the actual allocated bone array size, triggering an out-of-bounds 8-byte heap write operation on the bone array buffer. This memory corruption issue can result in program crash and abnormal memory modification, allowing remote attackers to perform denial-of-service (DoS) attacks via a specially constructed MDL model file. |
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| Source | ⚠️ https://github.com/assimp/assimp/issues/6631 |
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| User | TYGLS (UID 94774) |
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| Submission | 06/29/2026 14:46 (2 months ago) |
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| Moderation | 08/16/2026 09:50 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 391146 [Open Asset Import Library Assimp 17c12da 3DGS MDL7 Model Output Mesh Generator MDLLoader.cpp GenerateOutputMeshes_3DGS_MDL7 buffer overflow] |
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| Points | 20 |
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