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CVE-2021-47519

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: can: m_can: m_can_read_fifo: fix memory leak in error branch In m_can_read_fifo(), if the second call to m_can_fifo_read() fail…

Published May 24, 2024CWE-401EPSS 0.50%

Overview

CVE-2021-47519 is a medium-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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: m_can: m_can_read_fifo: fix memory leak in error branch

In m_can_read_fifo(), if the second call to m_can_fifo_read() fails,

the function jump to the out_fail label and returns without calling

m_can_receive_skb(). This means that the skb previously allocated by

alloc_can_skb() is not freed. In other terms, this is a memory leak.

This patch adds a goto label to destroy the skb if an error occurs.

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/31cb32a590d62b18f69a9a6d433f4e69c74fdd56Refgit.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908Refgit.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56Refgit.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47519?

CVE-2021-47519 is a medium-severity vulnerability. It was published on May 24, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47519?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47519?

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-2021-47519?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47519 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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