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CVE-2021-41227

Arbitrary memory read in `ImmutableConst`

MEDIUM
5.5
CVSS Score
Published: November 5, 2021 at 10:30 PM UTC
Updated: June 17, 2026 at 04:08 AM UTC
2 products affected across 2 vendorsTensorflowTensorFlow

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

TensorFlow is an open source platform for machine learning. In affected versions the `ImmutableConst` operation in TensorFlow can be tricked into reading arbitrary memory contents. This is because the `tstring` TensorFlow string class has a special case for memory mapped strings but the operation itself does not offer any support for this datatype. 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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Tensorflow· Google
95%
2.4.0 ≤ v < 2.4.42.5.0 ≤ v < 2.5.22.6.0 ≤ v < 2.6.12.7.0 rc02.7.0 rc1
Affected range stops below 2.4.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.5.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.6.1, so it looks safe — our inference, not a vendor statement
TensorFlow· Tensorflow
60%
v < 2.4.4v < 2.5.2v < 2.6.1
Affected range stops below 2.4.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.5.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.6.1, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tensorflow/tensorflow/commit/1cb6bb6c2a6019417c9adaf9e6843ba75ee2580b
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tensorflow/tensorflow/commit/3712a2d3455e6ccb924daa5724a3652a86f6b585
x_refsource_CONFIRMExploitPatchThird Party Advisory
Source: [email protected]
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-j8c8-67vp-6mx7

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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