# CVE-2025-63397: Denial of service in n/a

> Attackers can cause a segmentation fault in OneFlow by adding a Python sequence to native code during broadcasting or type conversion.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Nov 2025
- **Updated:** 5 Jul 2026
- **Also known as:** GHSA-5mr4-m32g-vmwq

## What is CVE-2025-63397?

CVE-2025-63397 is a medium-severity denial of service vulnerability in n/a, published on 10 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper input validation in OneFlow v0.9.0 allows attackers to cause a segmentation fault via adding a Python sequence to the native code during broadcasting/type conversion.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-63397?

It affects 1 product.


Products: Oneflow Oneflow.

## How do I fix CVE-2025-63397?

No fix has been published for CVE-2025-63397 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63397 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63397 exists.

## Other vulnerabilities in n/a

- [CVE-2024-36736](https://insights.sbomify.com/CVE-2024-36736/): Other in n/a (critical 9.8)
- [CVE-2025-65886](https://insights.sbomify.com/CVE-2025-65886/): Denial of service in n/a (high 7.5)
- [CVE-2025-65888](https://insights.sbomify.com/CVE-2025-65888/): Denial of service in n/a (high 7.5)
- [CVE-2025-65889](https://insights.sbomify.com/CVE-2025-65889/): Denial of service in n/a (high 7.5)
- [CVE-2025-65890](https://insights.sbomify.com/CVE-2025-65890/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-63397 and fix it if it is affected.

What it is: CVE-2025-63397 is a medium-severity denial of service vulnerability in n/a, published on 10 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63397 exists.

Affected product: n/a. 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-2025-63397/ (Markdown: https://insights.sbomify.com/CVE-2025-63397/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63397
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63397
- OSV: https://osv.dev/vulnerability/CVE-2025-63397

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-63397/
Summaries are generated and may contain mistakes; the official description above is the record.