HOMEVULNERABILITIESCVE-2021-29546
HIGH

CVE-2021-29546

CWE-369Published: May 14, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger an integer division by zero undefined behavior in `tf.raw_ops.QuantizedBiasAdd`. This is because the implementation of the Eigen kernel(https://github.com/tensorflow/tensorflow/blob/61bca8bd5ba8a68b2d97435ddfafcdf2b85672cd/tensorflow/core/kernels/quantization_utils.h#L812-L849) does a division by the number of elements of the smaller input (based on shape) without checking that this is not zero. 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.

NVD Source

Technical Analysis

CVE-2021-29546 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Google1 product(s)
tensorflow
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/tensorflow/tensorflow/commit/67784700869470d65d5f2ef20aeb5e97c31673cb
PATCHhttps://github.com/tensorflow/tensorflow/security/advisories/GHSA-m34j-p8rj-wjxq
PATCHhttps://github.com/tensorflow/tensorflow/commit/67784700869470d65d5f2ef20aeb5e97c31673cb
PATCHhttps://github.com/tensorflow/tensorflow/security/advisories/GHSA-m34j-p8rj-wjxq

All References (4)

→
https://github.com/tensorflow/tensorflow/commit/67784700869470d65d5f2ef20aeb5e97c31673cbPatch · Third Party Advisory
→
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-m34j-p8rj-wjxqExploit · Patch · Third Party Advisory
→
https://github.com/tensorflow/tensorflow/commit/67784700869470d65d5f2ef20aeb5e97c31673cbPatch · Third Party Advisory
→
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-m34j-p8rj-wjxqExploit · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2021-29546
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-369
CISA KEVNo
Affected1 vendor(s)
PublishedMay 14, 2021

Related CVEs (CWE-369)

CVE-2017-11720
9.8
CVE-2026-46470
9.1
CVE-2020-20892
8.8
CVE-2025-4637
8.7
CVE-2024-26945
8.4
CVE-2021-29589
7.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-29546 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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