| Package | Affected versions | Patched versions |
|---|---|---|
| tensorflow | ≥ 2.7.0, < 2.7.2≥ 2.8.0, < 2.8.1< 2.6.4 | 2.7.22.8.12.6.4 |
| tensorflow-cpu | ≥ 2.7.0, < 2.7.2≥ 2.8.0, < 2.8.1< 2.6.4 | 2.7.22.8.12.6.4 |
| tensorflow-gpu | ≥ 2.7.0, < 2.7.2≥ 2.8.0, < 2.8.1< 2.6.4 | 2.7.22.8.12.6.4 |
| tensorflow | = 2.7.0= 2.8.0= 2.9.0≥ 2.7.0, < 2.7.2< 2.6.4 | 2.7.22.6.4 |
The implementation of tf.histogram_fixed_width is vulnerable to a crash when the values array contain NaN elements:
import tensorflow as tf
import numpy as np
tf.histogram_fixed_width(values=np.nan, value_range=[1,2])
The implementation assumes that all floating point operations are defined and then converts a floating point result to an integer index:
index_to_bin.device(d) =
((values.cwiseMax(value_range(0)) - values.constant(value_range(0)))
.template cast<double>() /
step)
.cwiseMin(nbins_minus_1)
.template cast<int32>();
If values contains NaN then the result of the division is still NaN and the cast to int32 would result in a crash.
This only occurs on the CPU implementation.
We have patched the issue in GitHub commit e57fd691c7b0fd00ea3bfe43444f30c1969748b5.
The fix will be included in TensorFlow 2.9.0. We will also cherrypick this commit on TensorFlow 2.8.1, TensorFlow 2.7.2, and TensorFlow 2.6.4, as these are also affected and still in supported range.
Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.
This vulnerability has been reported externally via a GitHub issue.
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