CVE-2025-3159 Open Asset Import Library Assimp ASE File ASEParser.cpp ParseLV4MeshBonesVertices heap-based overflow
A heap-based buffer overflow in Assimp's ASE parser allows local attackers to execute arbitrary code or cause denial of service via malicious files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-3159?
CVE-2025-3159 is a medium-severity memory corruption vulnerability in Open Asset Import Library Assimp, published on 3 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability, which was classified as critical, was found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::ASE::Parser::ParseLV4MeshBonesVertices of the file code/AssetLib/ASE/ASEParser.cpp of the component ASE File Handler. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used. The identifier of the patch is e8a6286542924e628e02749c4f5ac4f91fdae71b. It is recommended to apply a patch to fix this issue.
Which versions are affected by CVE-2025-3159?
1 open source package ship an affected version, including pyassimp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyassimp PyPI | All versions to 5.4.3 | None |
Products include Assimp Assimp.
How do I fix CVE-2025-3159?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-3159 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3159 exists.
Other vulnerabilities in Open Asset Import Library Assimp
Sources
Also known as CLSA-2025-1763033515, DEBIAN-CVE-2025-3159, GHSA-8qp4-7g6w-2wp3, PYSEC-2025-263, UBUNTU-CVE-2025-3159.