CVE-2020-26268 Information

Description

In affected versions of TensorFlow the tf.raw_ops.ImmutableConst operation returns a constant tensor created from a memory mapped file which is assumed immutable. However if the type of the tensor is not an integral type the operation crashes the Python interpreter as it tries to write to the memory area. If the file is too small TensorFlow properly returns an error as the memory area has fewer bytes than what is needed for the tensor it creates. However as soon as there are enough bytes the above snippet causes a segmentation fault. This is because the allocator used to return the buffer data is not marked as returning an opaque handle since the needed virtual method is not overridden. This is fixed in versions 1.15.5 2.0.4 2.1.3 2.2.2 2.3.2 and 2.4.0.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Reference

https://github.com/tensorflow/tensorflow/commit/c1e1fc899ad5f8c725dcbb6470069890b5060bc7 https://github.com/tensorflow/tensorflow/security/advisories/GHSA-hhvc-g5hv-48c6

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

LOW

Base Severity

4.4