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PoC: Integer Overflow in Arm NN TensorShape::GetNumElements()

Vulnerability

Integer overflow in TensorShape::GetNumElements() in ARM-software/armnn (v26.01 and earlier).

Files

  • poc_overflow.armnn - Malicious Arm NN FlatBuffer model with dims [65536, 65537]
  • poc_armnn_overflow.py - Python script to generate the PoC model

Impact

Heap buffer over-read of ~4GB when loading and running inference on the crafted model.

Details

See the full report for details on the integer overflow in 32-bit unsigned multiplication.

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