CVE-2019-16778

Name: CVE-2019-16778
Creator: NVD / NIST
Published: 2019-12-16T21:15:11.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.78%

Last modified Jun 17, 2026

CVE-2019-16778 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In TensorFlow before 1.15, a heap buffer overflow in UnsortedSegmentSum can be produced when the Index template argument is int32. In this case data_size and num_segments fields are truncated from int64 to int32 and can produce negative numbers, resulting in accessing out of bounds heap memory. EPSS estimates a 0.78% chance of exploitation in the next 30 days.

Description

In TensorFlow before 1.15, a heap buffer overflow in UnsortedSegmentSum can be produced when the Index template argument is int32. In this case data_size and num_segments fields are truncated from int64 to int32 and can produce negative numbers, resulting in accessing out of bounds heap memory. This is unlikely to be exploitable and was detected and fixed internally in TensorFlow 1.15 and 2.0.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.78%

51.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Google	Tensorflow	>= 1.0.0, < 1.15.0

References

https://github.com/tensorflow/tensorflow/blob/master/tensorflow/security/advisory/tfsa-2019-002.mdThird Party Advisory
https://github.com/tensorflow/tensorflow/commit/db4f9717c41bccc3ce10099ab61996b246099892Patch
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-844w-j86r-4x2jPatch, Third Party Advisory
https://github.com/tensorflow/tensorflow/blob/master/tensorflow/security/advisory/tfsa-2019-002.mdThird Party Advisory
https://github.com/tensorflow/tensorflow/commit/db4f9717c41bccc3ce10099ab61996b246099892Patch
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-844w-j86r-4x2jPatch, Third Party Advisory

Timeline

Published: Dec 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16778?

How severe is CVE-2019-16778?

CVE-2019-16778 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.78% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16778?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16778?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST