Assimp up to 6.0.6 OgreBinarySerializer ReadSubMesh integer overflow

Summaryinfo

A vulnerability was found in Assimp up to 6.0.6. It has been classified as problematic. Affected is the function OgreBinarySerializer::ReadSubMesh of the component OgreBinarySerializer. This manipulation causes integer overflow. This vulnerability is handled as CVE-2026-129479. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Assimp up to 6.0.6. Affected by this vulnerability is the function OgreBinarySerializer::ReadSubMesh of the component OgreBinarySerializer. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. As an impact it is known to affect availability. The summary by CVE is:

Assimp through 6.0.6 contains an integer overflow vulnerability in OgreBinarySerializer::ReadSubMesh that allows attackers to crash applications by supplying crafted Ogre binary .mesh files. Attackers can set a large index count so the 32-bit buffer size wraps, causing a segmentation fault in aiMesh::~aiMesh() during scene teardown.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-129479 since 11/15/2026. The exploitation appears to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Assimp

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6

Website

• Product: https://github.com/assimp/assimp/

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