What’s Vulnerable › Vulnerabilities
CVE-2019-16778: Heap buffer overflow in `UnsortedSegmentSum` in TensorFlow
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.8% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-12-16 · updated 2026-06-17
- Weakness: CWE-122
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.
Affected products
- tensorflow: from 1.0.0 before 1.15.0 — fixed in 1.15.0
How to fix
Upgrade to a fixed version: tensorflow 1.15.0. Check the vendor advisory for mitigations.
References
- https://github.com/tensorflow/tensorflow/blob/master/tensorflow/security/advisory/tfsa-2019-002.md
- https://github.com/tensorflow/tensorflow/commit/db4f9717c41bccc3ce10099ab61996b246099892
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-844w-j86r-4x2j
- https://github.com/tensorflow/tensorflow/blob/master/tensorflow/security/advisory/tfsa-2019-002.md
- https://github.com/tensorflow/tensorflow/commit/db4f9717c41bccc3ce10099ab61996b246099892
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-844w-j86r-4x2j
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