CVE-2021-29545

TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger a denial of service via a `CHECK`-fail in converting sparse tensors to CSR Sparse matrices. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/800346f2c03a27e182dd4fba48295f65e7790739/tensorflow/core/kernels/sparse/kernels.cc#L66) does a double redirection to access an element of an array allocated on the heap. If the value at `indices(i, 0)` is such that `indices(i, 0) + 1` is outside the bounds of `csr_row_ptr`, this results in writing outside of bounds of heap allocated data. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.

• CWE-131

• https://github.com/tensorflow/tensorflow/commit/1e922ccdf6bf46a3a52641f99fd47d54c1decd13Patch, Third Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-hmg3-c7xj-6qwmExploit, Patch, Third Party Advisory
• https://github.com/tensorflow/tensorflow/commit/1e922ccdf6bf46a3a52641f99fd47d54c1decd13Patch, Third Party Advisory
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-hmg3-c7xj-6qwmExploit, Patch, Third Party Advisory

Published

May 14, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-29539TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29540TensorFlow is an end-to-end open source platform for machine…7.8
• CVE-2021-29541TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29542TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29543TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29544TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29546TensorFlow is an end-to-end open source platform for machine…7.8
• CVE-2021-29547TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29548TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29549TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29550TensorFlow is an end-to-end open source platform for machine…5.5
• CVE-2021-29551TensorFlow is an end-to-end open source platform for machine…5.5