CVE-2025-55557Public exploitNetwork attack vector

Service interruption via undefined Inductor index variable

Published Sep 25, 2025 · Updated Sep 25, 2025

Uncaught exception in PyTorch 2.7.0 allows remote attackers to interrupt services by submitting a model using torch.cummin for Inductor compilation. Inductor's cummin lowering passes the literal rindex name instead of constructing an index expression, so a one-element tensor produces Triton code that stores an undefined variable and raises NameError. Exploitation requires an application to compile attacker-supplied models with the Inductor backend, and the demonstrated CUDA path aborts compilation rather than corrupting model data.

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

Uncaught exception in PyTorch 2.7.0 allows remote attackers to interrupt services by submitting a model using torch.cummin for Inductor compilation. Inductor's cummin lowering passes the literal rindex name instead of constructing an index expression, so a one-element tensor produces Triton code that stores an undefined variable and raises NameError. Exploitation requires an application to compile attacker-supplied models with the Inductor backend, and the demonstrated CUDA path aborts compilation rather than corrupting model data.

The record

CVE
CVE-2025-55557
Published
Sep 25, 2025
Updated
Sep 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-248, T1499.004
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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-248Uncaught Exception
T1499.004Application or System Exploitation 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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