CVE-2021-29544Public exploit

Process crash via unchecked tensor ranks

Published May 14, 2021 · Updated Oct 31, 2024

Improper input validation in Google TensorFlow 2.4.0 and 2.4.1 allows local users to crash the process with malformed tensors. The QuantizeAndDequantizeV4GradientOp kernel accepts rank-two input_min or input_max tensors and passes them to vec(), whose rank-one requirement terminates execution with a CHECK failure. Exploitation requires local code execution that invokes the raw operation; it interrupts only the hosting process, with no reported data disclosure or modification.

CVSS severity2.5
Low
EPSS probability0.31%
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 Google TensorFlow 2.4.0 and 2.4.1 allows local users to crash the process with malformed tensors. The QuantizeAndDequantizeV4GradientOp kernel accepts rank-two input_min or input_max tensors and passes them to vec(), whose rank-one requirement terminates execution with a CHECK failure. Exploitation requires local code execution that invokes the raw operation; it interrupts only the hosting process, with no reported data disclosure or modification.

The record

CVE
CVE-2021-29544
Published
May 14, 2021
Updated
Oct 31, 2024
Vendor
Google
Product
TensorFlow
Classifications
CWE-754, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 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=>= 2.4.0, < 2.4.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · TensorFlowversion=>= 2.4.0, < 2.4.2

Published CVSS scores

5.5NIST NVDCVSS: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
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P

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-754Improper Check for Unusual or Exceptional Conditions
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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