CVE-2021-41201

Summary

TensorFlow is an open source platform for machine learning. In affeced versions during execution, EinsumHelper::ParseEquation() is supposed to set the flags in input_has_ellipsis vector and *output_has_ellipsis boolean to indicate whether there is ellipsis in the corresponding inputs and output. However, the code only changes these flags to true and never assigns false. This results in unitialized variable access if callers assume that EinsumHelper::ParseEquation() always sets these flags. The fix will be included in TensorFlow 2.7.0. We will also cherrypick this commit on TensorFlow 2.6.1, TensorFlow 2.5.2, and TensorFlow 2.4.4, as these are also affected and still in supported range.

Affected Software

VendorProductVersion RangeStatus
tensorflowtensorflow>= 2.6.0, < 2.6.1affected
tensorflowtensorflow>= 2.5.0, < 2.5.2affected
tensorflowtensorflow< 2.4.4affected

Weaknesses

  • CWE-824: CWE-824: Access of Uninitialized Pointer

ADP Enrichment

CVE Program Container

Additional References

References