Use-after-free in TensorFlow - CVE-2021-41220
Published: November 5, 2021 / Updated: May 3, 2026
Vulnerability identifier: #VU129190
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-41220
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
TensorFlow
TensorFlow
Software vendor:
TensorFlow
TensorFlow
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in the async implementation of CollectiveReduceV2 when processing crafted input to the operation. A remote attacker can invoke the operation with crafted arguments to cause a denial of service.
The issue can also manifest as memory leaks or std::bad_alloc exceptions due to undefined behavior in error handling.
Remediation
Install security update from vendor's website.