CVE-2021-29520
Heap buffer overflow in `Conv3DBackprop*`
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
TensorFlow is an end-to-end open source platform for machine learning. Missing validation between arguments to `tf.raw_ops.Conv3DBackprop*` operations can result in heap buffer overflows. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/4814fafb0ca6b5ab58a09411523b2193fed23fed/tensorflow/core/kernels/conv_grad_shape_utils.cc#L94-L153) assumes that the `input`, `filter_sizes` and `out_backprop` tensors have the same shape, as they are accessed in parallel. 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Low2.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.5.
Weakness
Affected products
- affected < 2.1.4
- affected >= 2.2.0, < 2.2.3
- affected >= 2.3.0, < 2.3.3
- affected >= 2.4.0, < 2.4.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPItensorflowGHSA-wcv5-qrj6-9pfm (opens in a new tab)
- PyPItensorflow-cpuGHSA-wcv5-qrj6-9pfm (opens in a new tab)
- PyPItensorflow-gpuGHSA-wcv5-qrj6-9pfm (opens in a new tab)
References (2)
- https://github.com/tensorflow/tensorflow/security/advisories/GHSA-wcv5-qrj6-9pfm (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/tensorflow/tensorflow/commit/8f37b52e1320d8d72a9529b2468277791a261197 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-wcv5-qrj6-9pfm (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-29520)Record last updated .