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Low severityNVD Advisory· Published May 14, 2021· Updated Aug 3, 2024

Division by 0 in `FusedBatchNorm`

CVE-2021-29555

Description

TensorFlow is an end-to-end open source platform for machine learning. An attacker can cause a denial of service via a FPE runtime error in tf.raw_ops.FusedBatchNorm. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/828f346274841fa7505f7020e88ca36c22e557ab/tensorflow/core/kernels/fused_batch_norm_op.cc#L295-L297) performs a division based on the last dimension of the x tensor. Since this is controlled by the user, an attacker can trigger a denial of service. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
tensorflowPyPI
< 2.1.42.1.4
tensorflowPyPI
>= 2.2.0, < 2.2.32.2.3
tensorflowPyPI
>= 2.3.0, < 2.3.32.3.3
tensorflowPyPI
>= 2.4.0, < 2.4.22.4.2
tensorflow-cpuPyPI
< 2.1.42.1.4
tensorflow-cpuPyPI
>= 2.2.0, < 2.2.32.2.3
tensorflow-cpuPyPI
>= 2.3.0, < 2.3.32.3.3
tensorflow-cpuPyPI
>= 2.4.0, < 2.4.22.4.2
tensorflow-gpuPyPI
< 2.1.42.1.4
tensorflow-gpuPyPI
>= 2.2.0, < 2.2.32.2.3
tensorflow-gpuPyPI
>= 2.3.0, < 2.3.32.3.3
tensorflow-gpuPyPI
>= 2.4.0, < 2.4.22.4.2

Affected products

1

Patches

1
1a2a87229d1d

Fix FPE issue with `tf.raw_ops.FusedBatchNorm`.

https://github.com/tensorflow/tensorflowAmit PatankarApr 28, 2021via ghsa
commit
1 file changed · +3 −0
  • tensorflow/core/kernels/fused_batch_norm_op.cc+3 −0 modified
    @@ -293,6 +293,9 @@ struct FusedBatchNorm<CPUDevice, T, U, /* is_training= */ false> {
     const CPUDevice& d = context->eigen_device<CPUDevice>();
 
     const int depth = x.dimension(3);
+    OP_REQUIRES(
+        context, depth != 0,
+        errors::Internal("The 4th element in the input shape cannot be 0."));
     const int size = x.size();
     const int rest_size = size / depth;
     Eigen::DSizes<Eigen::Index, 2> rest_by_depth(rest_size, depth);

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

7

News mentions

0

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