Buffer overflow in Assimp
CVE-2025-6120
A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (15.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Assimp
- Open Asset Import Library Assimp — versions 5.4.0, 5.4.1, 5.4.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/assimp/assimp/issues/6220 (issue-tracking, Exploit, Third Party Advisory, Issue Tracking)
- github.com/assimp/assimp/issues/6220 (issue-tracking, Issue Tracking)
- github.com/user-attachments/files/20605340/read_meshes_reproduce.tar.gz (Exploit, exploit)
Frequently asked questions
- What is CVE-2025-6120?
- CVE-2025-6120 is a medium-severity vulnerability in Assimp, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-06-16.
- How severe is CVE-2025-6120?
- Medium severity. CVSS v3 base score is 5.3 out of 10.