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TI-2021-18059 Aliases CVE-2021-41220GHSA-gpfh-jvf9-7wg5

Use after free in `CollectiveReduceV2`

Priority LOW 33CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-416 and the CVSS impact.

Summary

TensorFlow is an open source platform for machine learning. In affected versions the async implementation of `CollectiveReduceV2` suffers from a memory leak and a use after free. This occurs due to the asynchronous computation and the fact that objects that have been `std::move()`d from are still accessed. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, as this version is the only one that is also affected.

Why it matters now

EPSS 0.00211 11th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed tensorflow (tensorflow): 2.6.1tensorflow (PyPI): 2.6.1+2 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Googletensorflow2.6.0 to before 2.6.12.6.1Patch availableCNA
—tensorflow (PyPI)2.6.0 to before 2.6.12.6.1Patch availableGHSA-gpfh-jvf9-7wg5
—tensorflow-cpu (PyPI)2.6.0 to before 2.6.12.6.1Patch availableGHSA-gpfh-jvf9-7wg5
—tensorflow-gpu (PyPI)2.6.0 to before 2.6.12.6.1Patch availableGHSA-gpfh-jvf9-7wg5
  • tensorflow VendorGoogle Affected 2.6.0 to before 2.6.1 Fixed in 2.6.1 Patch available CNA
  • tensorflow (PyPI) Vendor— Affected 2.6.0 to before 2.6.1 Fixed in 2.6.1 Patch available GHSA-gpfh-jvf9-7wg5
  • tensorflow-cpu (PyPI) Vendor— Affected 2.6.0 to before 2.6.1 Fixed in 2.6.1 Patch available GHSA-gpfh-jvf9-7wg5
  • tensorflow-gpu (PyPI) Vendor— Affected 2.6.0 to before 2.6.1 Fixed in 2.6.1 Patch available GHSA-gpfh-jvf9-7wg5

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*2.6.0 to before 2.6.1VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.7.0:rc0:*:*:*:*:*:*2.7.0 rc0VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.7.0:rc1:*:*:*:*:*:*2.7.0 rc1VulnerableGoogle
  • cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:* Versions 2.6.0 to before 2.6.1 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.7.0:rc0:*:*:*:*:*:* Versions 2.7.0 rc0 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.7.0:rc1:*:*:*:*:*:* Versions 2.7.0 rc1 Vulnerable ·Google

Remediation

  • Fix · CNA tensorflow (tensorflow) Fixed in 2.6.1
  • Fix · GHSA-gpfh-jvf9-7wg5 tensorflow (PyPI) Fixed in 2.6.1 Advisory →
  • Fix · GHSA-gpfh-jvf9-7wg5 tensorflow-cpu (PyPI) Fixed in 2.6.1 Advisory →
  • Fix · GHSA-gpfh-jvf9-7wg5 tensorflow-gpu (PyPI) Fixed in 2.6.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41220
  2. 2026-10-03 Alias added: GHSA-gpfh-jvf9-7wg5

References

Exploit 1

Patch 1

Advisory 1

Other 4

  • TI-2022-20241 FractionalMaxPool and FractionalAVGPool heap out-of-bounds acess in Tensorflow CVSS 3.1CRITICAL 9.8
  • TI-2022-07640 Integer overflow in Tensorflow CVSS 3.1CRITICAL 9.8
  • TI-2022-07627 Out of bounds read and write in Tensorflow CVSS 3.1HIGH 8.8
  • TI-2022-07619 Out of bounds write in Tensorflow CVSS 3.1HIGH 8.8
  • TI-2022-07613 Read and Write outside of bounds in TFLite CVSS 3.1HIGH 8.8
  • TI-2022-07612 Integer overflow in TFLite CVSS 3.1HIGH 8.8
See all 430 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences