CVE-2021-41204

Process crash via resource-tensor constant folding

Published Nov 5, 2021 · Updated Aug 4, 2024

Denial of service in Google TensorFlow before 2.4.4, 2.5.0 through 2.5.1, and 2.6.0 allows local users to crash a process. IsConstantFoldable in Grappler's constant_folding.cc treats every constant as foldable, so the optimizer attempts an invalid deep copy when a constant node outputs DT_RESOURCE. Exploitation requires low-privileged local control of a graph processed by the optimizer and interrupts only the hosting process through a segmentation fault.

CVSS severity5.5
Medium
EPSS probability0.14%
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 Google TensorFlow before 2.4.4, 2.5.0 through 2.5.1, and 2.6.0 allows local users to crash a process. IsConstantFoldable in Grappler's constant_folding.cc treats every constant as foldable, so the optimizer attempts an invalid deep copy when a constant node outputs DT_RESOURCE. Exploitation requires low-privileged local control of a graph processed by the optimizer and interrupts only the hosting process through a segmentation fault.

The record

CVE
CVE-2021-41204
Published
Nov 5, 2021
Updated
Aug 4, 2024
Vendor
Google
Product
TensorFlow
Classifications
CWE-824
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=< 2.4.4
  2. Affected versionversion=>= 2.5.0, < 2.5.1
  3. Affected versionversion=>= 2.6.0, < 2.6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · TensorFlowversion=< 2.4.4; version=>= 2.5.0, < 2.5.1; version=>= 2.6.0, < 2.6.1

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-824Access of Uninitialized Pointer

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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