CVE-2021-29554Public exploit

Process crash via zero batch-dimension divisor

Published May 14, 2021 · Updated Aug 3, 2024

Divide-by-zero in Google's TensorFlow DenseCountSparseOutput allows local users to crash a process via crafted zero-dimension tensors. The count_ops.cc kernel multiplies values-tensor batch dimensions into num_batch_elements, then divides by that user-controlled result without rejecting zero. Exploitation requires local code capable of invoking the raw operation and controlling its values argument; the demonstrated consequence is termination of the current TensorFlow process.

CVSS severity2.5
Low
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in Google's TensorFlow DenseCountSparseOutput allows local users to crash a process via crafted zero-dimension tensors. The count_ops.cc kernel multiplies values-tensor batch dimensions into num_batch_elements, then divides by that user-controlled result without rejecting zero. Exploitation requires local code capable of invoking the raw operation and controlling its values argument; the demonstrated consequence is termination of the current TensorFlow process.

The record

CVE
CVE-2021-29554
Published
May 14, 2021
Updated
Aug 3, 2024
Vendor
Google
Product
TensorFlow
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=< 2.3.3
  2. Affected versionversion=>= 2.4.0, < 2.4.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · TensorFlowversion=< 2.3.3; version=>= 2.4.0, < 2.4.2

Published CVSS scores

5.5NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Endpoint Denial of Service Application 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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