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CVE-2021-47258

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix error handling of scsi_host_alloc() After device is initialized via device_initialize(), or its name is set via…

Published May 21, 2024CWE-401EPSS 0.24%

Overview

CVE-2021-47258 is a medium-severity vulnerability. It was published on May 21, 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:

scsi: core: Fix error handling of scsi_host_alloc()

After device is initialized via device_initialize(), or its name is set via

dev_set_name(), the device has to be freed via put_device(). Otherwise

device name will be leaked because it is allocated dynamically in

dev_set_name().

Fix the leak by replacing kfree() with put_device(). Since

scsi_host_dev_release() properly handles IDA and kthread removal, remove

special-casing these from the error handling as well.

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/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6aRefgit.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7Refgit.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006Refgit.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8Refgit.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11Refgit.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900aRefgit.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66Refgit.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6aRefgit.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7Refgit.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47258?

CVE-2021-47258 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47258?

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-2021-47258?

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-2021-47258?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47258 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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