CVE-2025-54949Network attack vector

Code execution via unchecked tensor copy bounds

Published Aug 7, 2025 · Updated Aug 12, 2025

Heap buffer overflow in ExecuTorch before 0.7.0 allows remote attackers to execute code by supplying a malformed model. The prim_ops::et_copy_index routine uses memcpy at index * size_copy_from without first ensuring the destination tensor has enough remaining space. No authentication or user interaction is required when a host application exposes model loading to untrusted network input; the overwrite can crash the process or enable code execution.

CVSS severity9.8
Critical
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in ExecuTorch before 0.7.0 allows remote attackers to execute code by supplying a malformed model. The prim_ops::et_copy_index routine uses memcpy at index * size_copy_from without first ensuring the destination tensor has enough remaining space. No authentication or user interaction is required when a host application exposes model loading to untrusted network input; the overwrite can crash the process or enable code execution.

The record

CVE
CVE-2025-54949
Published
Aug 7, 2025
Updated
Aug 12, 2025
Vendor
Meta Platforms, Inc.
Product
ExecuTorch
Classifications
CWE-122
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <https://github.com/pytorch/executorch/commit/ede82493dae6d2d43f8c424e7be4721abe5242be

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meta Platforms, Inc. · ExecuTorchversion=0 <https://github.com/pytorch/executorch/commit/ede82493dae6d2d43f8c424e7be4721abe5242be

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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