| Title | Assimp commit 17c12da NULL Pointer Dereference |
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| Description | A NULL pointer dereference vulnerability exists in Assimp commit 17c12da, located in the `glTF2Importer::ImportEmbeddedTextures` function in `code/AssetLib/glTF2/glTF2Importer.cpp` at line 1725. The flaw is triggered by processing maliciously crafted glTF files containing malformed `mimeType` values that lack the '/' character. The application fails to validate the return value of the `strchr` function; when `strchr` returns NULL due to the missing delimiter, unsafe pointer arithmetic (+1) generates an invalid memory address (0x1), which is then dereferenced in a `strncmp` operation. This causes an invalid memory read and immediate application crash (segmentation fault). Remote attackers can exploit this vulnerability by supplying a malicious glTF file to execute a denial-of-service (DoS) attack against affected Assimp-based applications without requiring any privileges or user interaction. |
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| Source | ⚠️ https://github.com/assimp/assimp/issues/6608 |
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| User | TYGLS (UID 94774) |
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| Submission | 05/07/2026 04:23 (3 months ago) |
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| Moderation | 05/31/2026 08:13 (24 days later) |
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| Status | Accepted |
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| VulDB entry | 367477 [Assimp up to 6.0.4 TF File glTF2Importer.cpp ImportEmbeddedTextures null pointer dereference] |
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| Points | 20 |
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