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

Division by 0 in `Conv2DBackpropFilter`

CVE-2021-29524

Description

TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger a division by 0 in tf.raw_ops.Conv2DBackpropFilter. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/496c2630e51c1a478f095b084329acedb253db6b/tensorflow/core/kernels/conv_grad_shape_utils.cc#L130) does a modulus operation where the divisor is controlled by the caller. 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
fca9874a9b42

Prevent another division by zero.

https://github.com/tensorflow/tensorflowMihai MaruseacApr 20, 2021via ghsa
commit
1 file changed · +4 −0
  • tensorflow/core/kernels/conv_grad_shape_utils.cc+4 −0 modified
    @@ -127,6 +127,10 @@ Status ConvBackpropComputeDimensionsV2(
   // dimensions of the filter Tensor.
   VLOG(2) << "input vs filter_in depth " << dims->in_depth << " "
           << filter_shape.dim_size(num_dims - 2);
+  if (filter_shape.dim_size(num_dims - 2) <= 0) {
+    return errors ::InvalidArgument(
+        label, ": filter depth must be strictly greated than zero");
+  }
   if (dims->in_depth % filter_shape.dim_size(num_dims - 2)) {
     return errors::InvalidArgument(
         label, ": input depth must be evenly divisible by filter 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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