CVE-2021-29559: Heap OOB access in unicode ops
2.5
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.0259%
CWE
Published
5/21/2021
Updated
10/31/2024
KEV Status
No
Technology
Python
Technical Details
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
---|---|---|---|
tensorflow | pip | < 2.1.4 | 2.1.4 |
tensorflow | pip | >= 2.2.0, < 2.2.3 | 2.2.3 |
tensorflow | pip | >= 2.3.0, < 2.3.3 | 2.3.3 |
tensorflow | pip | >= 2.4.0, < 2.4.2 | 2.4.2 |
tensorflow-cpu | pip | < 2.1.4 | 2.1.4 |
tensorflow-cpu | pip | >= 2.2.0, < 2.2.3 | 2.2.3 |
tensorflow-cpu | pip | >= 2.3.0, < 2.3.3 | 2.3.3 |
tensorflow-cpu | pip | >= 2.4.0, < 2.4.2 | 2.4.2 |
tensorflow-gpu | pip | < 2.1.4 | 2.1.4 |
tensorflow-gpu | pip | >= 2.2.0, < 2.2.3 | 2.2.3 |
tensorflow-gpu | pip | >= 2.3.0, < 2.3.3 | 2.3.3 |
tensorflow-gpu | pip | >= 2.4.0, < 2.4.2 | 2.4.2 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stems from the UnicodeEncodeOp::Compute function's failure to validate input_splits parameters. The commit diff shows critical validation logic was added to this function (OP_REQUIRES checks for split boundaries and ordering). The original code processed input_splits without these safeguards, allowing attackers to craft malicious split/values pairs that access memory beyond the allocated buffer. The direct correlation between the vulnerability description, CWE-125 classification, and the patched code location confirms this function's role.