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CVE-2021-47143

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net/smc: remove device from smcd_dev_list after failed device_add() If the device_add() for a smcd_dev fails, there's no cleanu…

Published Mar 25, 2024CWE-459EPSS 0.22%

Overview

CVE-2021-47143 is a medium-severity vulnerability. It was published on March 25, 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:

net/smc: remove device from smcd_dev_list after failed device_add()

If the device_add() for a smcd_dev fails, there's no cleanup step that

rolls back the earlier list_add(). The device subsequently gets freed,

and we end up with a corrupted list.

Add some error handling that removes the device from the list.

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/40588782f1016c655ae1d302892f61d35af96842Refgit.kernel.org/stable/c/444d7be9532dcfda8e0385226c862fd7e986f607Refgit.kernel.org/stable/c/8b2cdc004d21a7255f219706dca64411108f7897Refgit.kernel.org/stable/c/40588782f1016c655ae1d302892f61d35af96842Refgit.kernel.org/stable/c/444d7be9532dcfda8e0385226c862fd7e986f607Refgit.kernel.org/stable/c/8b2cdc004d21a7255f219706dca64411108f7897

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47143?

CVE-2021-47143 is a medium-severity vulnerability. It was published on March 25, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47143?

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-2021-47143?

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-2021-47143?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47143 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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