# CVE-2025-8854: bullet3 VHACD utility: stack-based buffer overflow in OFF parser (LoadOFF)

> Remote attackers can execute arbitrary code via a crafted OFF file due to a stack-based buffer overflow in the Bullet3 VHACD utility.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Aug 2025
- **Updated:** 11 Aug 2025
- **Also known as:** GHSA-g93w-7xh8-gh45

## What is CVE-2025-8854?

CVE-2025-8854 is a high-severity memory corruption vulnerability in bulletphysics bullet3, published on 11 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Stack-based buffer overflow in LoadOFF in bulletphysics bullet3 before 3.26 on all platforms allows remote attackers to execute arbitrary code via a crafted OFF file with an overlong initial token processed by the VHACD test utility or invoked indirectly through PyBullet's vhacd function.

Weakness: CWE-787 (Out-of-bounds Write), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2025-8854?

It affects 1 product.


Products: Bulletphysics Pybullet.

## How do I fix CVE-2025-8854?

No fix has been published for CVE-2025-8854 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-8854 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8854 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-8854 and fix it if it is affected.

What it is: CVE-2025-8854 is a high-severity memory corruption vulnerability in bulletphysics bullet3, published on 11 Aug 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8854 exists.

Affected product: bulletphysics bullet3. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-8854/ (Markdown: https://insights.sbomify.com/CVE-2025-8854/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-8854
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-8854
- OSV: https://osv.dev/vulnerability/CVE-2025-8854

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-8854/
Summaries are generated and may contain mistakes; the official description above is the record.