# CVE-2025-71001: Oneflow-Inc OneFlow segmentation fault in flow.column_stack

Source: https://junglewise.ai/threats/cve-2025-71001-oneflow-inc-oneflow-segmentation-fault-in-flow-column-stack  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-28. Updated: 2026-07-05  
License: CC BY 4.0 with a link back

CVE-2025-71001 · Severity: medium · CVSS 6.5 · Published 2026-01-28

OneFlow is an open-source deep learning framework used for building and training machine learning models. A flaw in how the software handles specific data inputs can cause the application to crash unexpectedly. This could allow an attacker to disrupt services or research activities by providing a specially crafted data file that triggers a system failure.

Technologies: [Oneflow](https://junglewise.ai/threats/technologies/oneflow). Vendors: [Oneflow](https://junglewise.ai/threats/vendors/oneflow).

## Quick answers

**Is CVE-2025-71001 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-71001 being exploited in the wild.

**How severe is CVE-2025-71001?** Medium severity, with a CVSS score of 6.5, published 28 January 2026.

**Which products and versions are affected?** Oneflow-Inc OneFlow 0.9.0.

**Is there a fix for CVE-2025-71001?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-71001 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-71001?** Check whether you run Oneflow. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A segmentation fault (CWE-125) exists in the flow.column_stack component of OneFlow v0.9.0. The vulnerability is triggered when the API attempts to process a list containing a mix of OneFlow tensors and NumPy arrays, leading to a type mismatch or invalid memory access. An attacker can exploit this by providing crafted input that causes the process to crash (core dump), resulting in a denial of service. The issue is confirmed in version 0.9.0 when running on environments such as Ubuntu 22.04 with Python 3.10.

## Affected products

- Oneflow-Inc OneFlow 0.9.0

## Timeline

- 2025-06-30: disclosed: Issue reported on GitHub repository
- 2026-01-28: advisory: NVD published CVE-2025-71001

## References

- [https://github.com/Daisy2ang](https://github.com/Daisy2ang)
- [https://github.com/Oneflow-Inc/oneflow/issues/10658](https://github.com/Oneflow-Inc/oneflow/issues/10658)

## Related threats

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- [OneFlow denial of service in flow.cuda.get_device_capability](https://junglewise.ai/threats/cve-2025-70999-oneflow-denial-of-service-in-flow-cuda-get-device-capability)
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- [OneFlow denial of service via invalid device ID in CUDA synchronization](https://junglewise.ai/threats/cve-2025-65890-oneflow-denial-of-service-via-invalid-device-id-in-cuda)
- [Oneflow-Inc OneFlow denial of service in flow.dstack](https://junglewise.ai/threats/cve-2025-65889-oneflow-inc-oneflow-denial-of-service-in-flow-dstack)