Vulnerability · Published Nov 5, 2021 · Assigned by GitHub_M
CVE-2021-41219Undefined behavior via `nullptr` reference binding in sparse matrix multiplication
High 7.8
In plain English
A high-severity security flaw in tensorflow from tensorflow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
TensorFlow is an open source platform for machine learning. In affected versions the code for sparse matrix multiplication is vulnerable to undefined behavior via binding a reference to `nullptr`. This occurs whenever the dimensions of `a` or `b` are 0 or less. In the case on one of these is 0, an empty output tensor should be allocated (to conserve the invariant that output tensors are always allocated when the operation is successful) but nothing should be written to it (that is, we should return early from the kernel implementation). Otherwise, attempts to write to this empty tensor would result in heap OOB access. 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | tensorflow | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-411 |
| PyPI | tensorflow | 2.6.1 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow | 2.5.2 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow | 2.4.4 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-cpu | 2.5.2 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-cpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-628 |
| PyPI | tensorflow-cpu | 2.6.1 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-cpu | 2.4.4 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-gpu | 2.4.4, 2.5.2, 2.6.1, 2.7.0 | PYSEC-2021-826 |
| PyPI | tensorflow-gpu | 2.6.1 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-gpu | 2.5.2 | GHSA-4f99-p9c2-3j8x |
| PyPI | tensorflow-gpu | 2.4.4 | GHSA-4f99-p9c2-3j8x |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| tensorflow | tensorflow | >= 2.6.0, < 2.6.1>= 2.5.0, < 2.5.2< 2.4.4 |
Weakness: CWE-824 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H