CVE-2026-10231 Assimp Half-Life 1 MDL Loader HL1MDLLoader.cpp extract_anim_value heap-based overflow
A heap-based buffer overflow in the Assimp library's Half-Life 1 MDL loader allows local attackers to execute arbitrary code or cause denial of service via crafted 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
- None listed
What is CVE-2026-10231?
CVE-2026-10231 is a medium-severity memory corruption vulnerability in Assimp, published on 1 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security flaw has been discovered in Assimp up to 6.0.4. Affected is the function HL1MDLLoader::extract_anim_value of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Performing a manipulation of the argument num.total results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The project tagged the reported issue as bug.
Which versions are affected by CVE-2026-10231?
How do I fix CVE-2026-10231?
No fix has been published for CVE-2026-10231 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-10231 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10231 exists.
Sources
Also known as DEBIAN-CVE-2026-10231, GHSA-wc3j-ch7g-2h36, UBUNTU-CVE-2026-10231.