CVE-2021-41195

Description

TensorFlow is an open source platform for machine learning. In affected versions the implementation of `tf.math.segment_*` operations results in a `CHECK`-fail related abort (and denial of service) if a segment id in `segment_ids` is large. This is similar to CVE-2021-29584 (and similar other reported vulnerabilities in TensorFlow, localized to specific APIs): the implementation (both on CPU and GPU) computes the output shape using `AddDim`. However, if the number of elements in the tensor overflows an `int64_t` value, `AddDim` results in a `CHECK` failure which provokes a `std::abort`. Instead, code should use `AddDimWithStatus`. 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.

How to fix CVE-2021-41195

To remediate CVE-2021-41195, upgrade the affected package to a fixed version below.

—upgrade to 2.4.4 or later
—upgrade to 2.6.1 or later
—upgrade to e9c81c1e1a9cd8dd31f4e83676cab61b60658429 or later
—upgrade to e9c81c1e1a9cd8dd31f4e83676cab61b60658429 or later
—upgrade to 2.6.1 or later
—upgrade to e9c81c1e1a9cd8dd31f4e83676cab61b60658429 or later
—upgrade to 2.6.1 or later

Is CVE-2021-41195 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

from 0, < 2.4.4, >= 2.5.0, < 2.5.2, >= 2.6.0, < 2.6.1
>= 2.6.0, < 2.6.1
from 0, < e9c81c1e1a9cd8dd31f4e83676cab61b60658429 | from 0, < 2.4.4, >= 2.5.0, < 2.5.2, >= 2.6.0, < 2.6.1
from 0, < e9c81c1e1a9cd8dd31f4e83676cab61b60658429 | from 0, < 2.4.4, >= 2.5.0, < 2.5.2, >= 2.6.0, < 2.6.1
>= 2.6.0, < 2.6.1
from 0, < e9c81c1e1a9cd8dd31f4e83676cab61b60658429 | from 0, < 2.4.4, >= 2.5.0, < 2.5.2, >= 2.6.0, < 2.6.1
>= 2.6.0, < 2.6.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
osv	CVSS 3.1	MEDIUM5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H