Description
A vulnerability classified as critical has been found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::AC3DImporter::ConvertObjectSection of the file code/AssetLib/AC/ACLoader.cpp of the component AC3D File Handler. The manipulation of the argument tmp leads to heap-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Open Asset Import Library | Assimp | 5.4.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | assimp | 6.0.5+ds-1 | — |
| Debian 13 | assimp | No fix yet | — |
| Debian 12 | assimp | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | assimp | No fix yet | — |
| Ubuntu 26.04 LTS | assimp | No fix yet | — |
| Ubuntu 25.10 | assimp | No fix yet | — |
| Ubuntu 24.04 LTS | assimp | No fix yet | — |
| Ubuntu 22.04 LTS | assimp | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | assimp | No fix yet | — |
| Ubuntu 18.04 LTS | assimp | No fix yet | — |
| Ubuntu 16.04 LTS | assimp | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | assimp | 6.0.4-1.1 | openSUSE-SU-2026:10174-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qt5-qt3d +2 | 5.15.3-1.amzn2.0.8 | ALAS2-2026-3187 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | pyassimp | <= 5.4.3 | — | PYSEC-2025-167 |
Advisories 2
- openSUSE-SU-2026:10174-1 assimp-devel-6.0.4-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2-2026-3187 Moderate: qt5-qt3d security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 5, 2026
References
- VDB-300861 | Open Asset Import Library Assimp AC3D File ACLoader.cpp ConvertObjectSection heap-based overflow vdb-entry technical-description
- VDB-300861 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #517790 | Open Asset Import Library Assimp >=5.4.3 Heap-based Buffer Overflow third-party-advisory
- https://github.com/assimp/assimp/issues/6018 issue-tracking
- https://github.com/assimp/assimp/issues/6018#issue-2877375815 exploit issue-tracking