CVE-2025-55560Public exploitNetwork attack vector

Model-processing interruption via missing sparse graph break

Published Sep 25, 2025 · Updated Sep 25, 2025

Denial of service in PyTorch 2.7.0 and earlier allows remote attackers to interrupt model processing through compiled sparse conversion. Dynamo fails to break the graph when torch.Tensor.to_sparse() is followed by torch.Tensor.to_dense(), so Inductor attempts unsupported lowering and raises a NotImplementedError. Reachability requires an application to accept an attacker-influenced model and compile that operation sequence with the Inductor backend; eager execution succeeds.

CVSS severity7.5
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in PyTorch 2.7.0 and earlier allows remote attackers to interrupt model processing through compiled sparse conversion. Dynamo fails to break the graph when torch.Tensor.to_sparse() is followed by torch.Tensor.to_dense(), so Inductor attempts unsupported lowering and raises a NotImplementedError. Reachability requires an application to accept an attacker-influenced model and compile that operation sequence with the Inductor backend; eager execution succeeds.

The record

CVE
CVE-2025-55560
Published
Sep 25, 2025
Updated
Sep 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2025Record 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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