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CVE-2021-47671

3.3 · LOW

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path In es58x_rx_err_msg(), if can->do_set_mode() fails, the func…

Published Apr 17, 2025CWE-401EPSS 0.18%

Overview

CVE-2021-47671 is a low-severity vulnerability. It was published on April 17, 2025 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path

In es58x_rx_err_msg(), if can->do_set_mode() fails, the function

directly returns without calling netif_rx(skb). This means that the

skb previously allocated by alloc_can_err_skb() is not freed. In other

terms, this is a memory leak.

This patch simply removes the return statement in the error branch and

let the function continue.

Issue was found with GCC -fanalyzer, please follow the link below for

details.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4f389e1276a5389c92cef860c9fde8e1c802a871Refgit.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfeRefgit.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47671?

CVE-2021-47671 is a low-severity vulnerability. It was published on April 17, 2025 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2021-47671?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47671?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47671?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47671 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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