`CHECK` failures in `UnbatchGradOp` in TensorFlow

Summary

TensorFlow is an open source platform for machine learning. The `UnbatchGradOp` function takes an argument `id` that is assumed to be a scalar. A nonscalar `id` can trigger a `CHECK` failure and crash the program. It also requires its argument `batch_index` to contain three times the number of elements as indicated in its `batch_index.dim_size(0)`. An incorrect `batch_index` can trigger a `CHECK` failure and crash the program. We have patched the issue in GitHub commit 5f945fc6409a3c1e90d6970c9292f805f6e6ddf2. The fix will be included in TensorFlow 2.10.0. We will also cherrypick this commit on TensorFlow 2.9.1, TensorFlow 2.8.1, and TensorFlow 2.7.2, as these are also affected and still in supported range. There are no known workarounds for this issue.

Timeline

1. Sep 16, 2022, 7:50 PM UTCCVE published
2. Apr 23, 2025, 2:00 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 23, 2025, 5:03 PM UTCRecord last updated

Affected versions

• tensorflow tensorflow

  fixed in 2.7.2; From 2.8.0 · fixed in 2.8.1; From 2.9.0 · fixed in 2.9.1

• tensorflowPyPI

  fixed in 2.7.2; From 2.8.0 · fixed in 2.8.1; From 2.9.0 · fixed in 2.9.1

• tensorflowPyPI

  fixed in 2.7.2

• tensorflowPyPI

  From 2.8.0 · fixed in 2.8.1

• tensorflowPyPI

  From 2.9.0 · fixed in 2.9.1

• tensorflow-cpuPyPI

  fixed in 2.7.2

• tensorflow-cpuPyPI

  From 2.8.0 · fixed in 2.8.1

• tensorflow-cpuPyPI

  From 2.9.0 · fixed in 2.9.1

• tensorflow-gpuPyPI

  fixed in 2.7.2

• tensorflow-gpuPyPI

  From 2.8.0 · fixed in 2.8.1

• tensorflow-gpuPyPI

  From 2.9.0 · fixed in 2.9.1

• tensorflow-gpuPyPI

  fixed in 2.7.2; From 2.8.0 · fixed in 2.8.1; From 2.9.0 · fixed in 2.9.1

• tensorflow-cpuPyPI

  fixed in 2.7.2; From 2.8.0 · fixed in 2.8.1; From 2.9.0 · fixed in 2.9.1

References 3