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

Reference binding to null in `ParameterizedTruncatedNormal`

CVE-2021-29568

Description

TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger undefined behavior by binding to null pointer in tf.raw_ops.ParameterizedTruncatedNormal. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/3f6fe4dfef6f57e768260b48166c27d148f3015f/tensorflow/core/kernels/parameterized_truncated_normal_op.cc#L630) does not validate input arguments before accessing the first element of shape. If shape argument is empty, then shape_tensor.flat<T>() is an empty array. 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
5e52ef5a4615

Fix breakage in parameterized_truncated_normal_op.cc

https://github.com/tensorflow/tensorflowMihai MaruseacMay 5, 2021via ghsa
commit
1 file changed · +3 −0
  • tensorflow/core/kernels/parameterized_truncated_normal_op.cc+3 −0 modified
    @@ -627,6 +627,9 @@ class ParameterizedTruncatedNormalOp : public OpKernel {
         ctx, TensorShapeUtils::IsVector(shape_tensor.shape()),
         errors::InvalidArgument("Input shape should be a vector, got shape: ",
                                 shape_tensor.shape().DebugString()));
+    OP_REQUIRES(ctx, shape_tensor.NumElements() > 0,
+                errors::InvalidArgument("Shape tensor must not be empty, got ",
+                                        shape_tensor.DebugString()));
     int32 num_batches = shape_tensor.flat<int32>()(0);
 
     int32 samples_per_batch = 1;

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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