CVE-2021-41219
Undefined behavior via `nullptr` reference binding in sparse matrix multiplication
描述
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.
如何修補 CVE-2021-41219
要修補 CVE-2021-41219,請將受影響套件升級到下列已修補版本。
- —升級至 2.6.1 或更新版本
- —升級至 2.6.1 或更新版本
- —升級至 2.6.1 或更新版本
CVE-2021-41219 正在被利用嗎?
低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- >= 2.6.0, < 2.6.1
- >= 2.6.0, < 2.6.1
- >= 2.6.0, < 2.6.1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |