CVE-2025-63397Public exploitNetwork attack vector

Process crash via mismatched broadcast addition

Published Nov 10, 2025 · Updated Jul 5, 2026

Improper input validation in OneFlow 0.9.0 allows attackers to crash a Python process by adding a sequence to an eye tensor. The flow.eye(n) addition path passes a shape-inconsistent Python list into native broadcasting and type conversion instead of rejecting it, causing a segmentation fault and core dump. Exploitation requires the ability to execute Python that invokes OneFlow, and the demonstrated consequence is termination of that process.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OneFlow 0.9.0 allows attackers to crash a Python process by adding a sequence to an eye tensor. The flow.eye(n) addition path passes a shape-inconsistent Python list into native broadcasting and type conversion instead of rejecting it, causing a segmentation fault and core dump. Exploitation requires the ability to execute Python that invokes OneFlow, and the demonstrated consequence is termination of that process.

The record

CVE
CVE-2025-63397
Published
Nov 10, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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