Description
A vulnerability, which was classified as critical, has been found in Open Asset Import Library Assimp 5.4.3. This issue affects the function CSMImporter::InternReadFile of the file code/AssetLib/CSM/CSMLoader.cpp. The manipulation leads to heap-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The patch is named 2690e354da0c681db000cfd892a55226788f2743. It is recommended to apply a patch to fix this issue.
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 | 6.0.2+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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP6 | assimp | 5.3.1-bp156.3.9.1 | openSUSE-SU-2025:0113-1 |
| SUSE Package Hub 15 SP6 | doomsday | 2.3.1-bp156.4.3.1 | openSUSE-SU-2025:0117-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | assimp | 5.4.3-5.1 | openSUSE-SU-2025:14950-1 |
| openSUSE Leap 15.6 | assimp | 5.3.1-bp156.3.9.1 | openSUSE-SU-2025:0113-1 |
| openSUSE Leap 15.6 | doomsday | 2.3.1-bp156.4.3.1 | openSUSE-SU-2025:0117-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | qt5-qt3d +2 | 5.15.3-1.amzn2.0.5 | ALAS2-2025-2848 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | pyassimp | <= 5.4.3 | — | PYSEC-2025-260 |
Advisories 4
- openSUSE-SU-2025:0113-1 Security update for assimp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:0117-1 Security update for doomsday SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14950-1 assimp-devel-5.4.3-5.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2025-2848 Moderate: qt5-qt3d security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 13, 2025
References
- VDB-300575 | Open Asset Import Library Assimp CSMLoader.cpp InternReadFile heap-based overflow vdb-entry technical-description
- VDB-300575 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #517782 | Open Asset Import Library Assimp >=5.4.3 Heap-based Buffer Overflow third-party-advisory
- https://github.com/assimp/assimp/issues/6010 issue-tracking
- https://github.com/assimp/assimp/pull/6052 issue-tracking
- https://github.com/assimp/assimp/issues/6010#issue-2877368110 exploit issue-tracking
- https://github.com/assimp/assimp/commit/2690e354da0c681db000cfd892a55226788f2743 patch