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TI-2021-15526 Aliases CVE-2021-37651GHSA-hpv4-7p9c-mvfr

Heap buffer overflow in `FractionalAvgPoolGrad` in TensorFlow

Priority LOW 33CWE-125Published · 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 · NVD. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

TensorFlow is an end-to-end open source platform for machine learning. In affected versions the implementation for `tf.raw_ops.FractionalAvgPoolGrad` can be tricked into accessing data outside of bounds of heap allocated buffers. The [implementation](https://github.com/tensorflow/tensorflow/blob/f24faa153ad31a4b51578f8181d3aaab77a1ddeb/tensorflow/core/kernels/fractional_avg_pool_op.cc#L205) does not validate that the input tensor is non-empty. Thus, code constructs an empty `EigenDoubleMatrixMap` and then accesses this buffer with indices that are outside of the empty area. We have patched the issue in GitHub commit 0f931751fb20f565c4e94aa6df58d54a003cdb30. The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.

Why it matters now

EPSS 0.00174 6th percentileScored 2026-11-07
Fix Fixed tensorflow (tensorflow): 2.5.1, 2.4.3, 2.3.4tensorflow (PyPI): 2.3.4, 2.4.3, 2.5.1+2 more products

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Googletensorflow2.5.0 to before 2.5.1; 2.4.0 to before 2.4.3; before 2.3.42.5.1, 2.4.3, 2.3.4Patch availableCNA
—tensorflow (PyPI)before 2.3.42.3.4Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow (PyPI)2.4.0 to before 2.4.32.4.3Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow (PyPI)2.5.0 to before 2.5.12.5.1Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-cpu (PyPI)before 2.3.42.3.4Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-cpu (PyPI)2.4.0 to before 2.4.32.4.3Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-cpu (PyPI)2.5.0 to before 2.5.12.5.1Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-gpu (PyPI)before 2.3.42.3.4Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-gpu (PyPI)2.4.0 to before 2.4.32.4.3Patch availableGHSA-hpv4-7p9c-mvfr
—tensorflow-gpu (PyPI)2.5.0 to before 2.5.12.5.1Patch availableGHSA-hpv4-7p9c-mvfr
  • tensorflow VendorGoogle Affected 2.5.0 to before 2.5.1; 2.4.0 to before 2.4.3; before 2.3.4 Fixed in 2.5.1, 2.4.3, 2.3.4 Patch available CNA
  • tensorflow (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-cpu (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-cpu (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-cpu (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-gpu (PyPI) Vendor— Affected before 2.3.4 Fixed in 2.3.4 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-gpu (PyPI) Vendor— Affected 2.4.0 to before 2.4.3 Fixed in 2.4.3 Patch available GHSA-hpv4-7p9c-mvfr
  • tensorflow-gpu (PyPI) Vendor— Affected 2.5.0 to before 2.5.1 Fixed in 2.5.1 Patch available GHSA-hpv4-7p9c-mvfr

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*2.3.0 to before 2.3.4; 2.4.0 to before 2.4.3VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.5.0:*:*:*:*:*:*:*2.5.0VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.6.0:rc0:*:*:*:*:*:*2.6.0 rc0VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.6.0:rc1:*:*:*:*:*:*2.6.0 rc1VulnerableGoogle
cpe:2.3:a:google:tensorflow:2.6.0:rc2:*:*:*:*:*:*2.6.0 rc2VulnerableGoogle
  • cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:* Versions 2.3.0 to before 2.3.4; 2.4.0 to before 2.4.3 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.5.0:*:*:*:*:*:*:* Versions 2.5.0 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.6.0:rc0:*:*:*:*:*:* Versions 2.6.0 rc0 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.6.0:rc1:*:*:*:*:*:* Versions 2.6.0 rc1 Vulnerable ·Google
  • cpe:2.3:a:google:tensorflow:2.6.0:rc2:*:*:*:*:*:* Versions 2.6.0 rc2 Vulnerable ·Google

Remediation

  • Fix · CNA tensorflow (tensorflow) Fixed in 2.5.1, 2.4.3, 2.3.4
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow (PyPI) Fixed in 2.3.4 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow (PyPI) Fixed in 2.4.3 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow (PyPI) Fixed in 2.5.1 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-cpu (PyPI) Fixed in 2.3.4 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-cpu (PyPI) Fixed in 2.4.3 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-cpu (PyPI) Fixed in 2.5.1 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-gpu (PyPI) Fixed in 2.3.4 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-gpu (PyPI) Fixed in 2.4.3 Advisory →
  • Fix · GHSA-hpv4-7p9c-mvfr tensorflow-gpu (PyPI) Fixed in 2.5.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-37651
  2. 2026-10-03 Alias added: GHSA-hpv4-7p9c-mvfr

References

Patch 1

Advisory 2

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