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CVE-2021-47113

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: btrfs: abort in rename_exchange if we fail to insert the second ref Error injection stress uncovered a problem where we'd leave…

Published Mar 15, 2024CWE-416EPSS 0.27%

Overview

CVE-2021-47113 is a high-severity vulnerability. It was published on March 15, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. 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:

btrfs: abort in rename_exchange if we fail to insert the second ref

Error injection stress uncovered a problem where we'd leave a dangling

inode ref if we failed during a rename_exchange. This happens because

we insert the inode ref for one side of the rename, and then for the

other side. If this second inode ref insert fails we'll leave the first

one dangling and leave a corrupt file system behind. Fix this by

aborting if we did the insert for the first inode ref.

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/0df50d47d17401f9f140dfbe752a65e5d72f9932Refgit.kernel.org/stable/c/dc09ef3562726cd520c8338c1640872a60187af5Refgit.kernel.org/stable/c/ff8de2cec65a8c8521faade12a31b39c80e49f5bRefgit.kernel.org/stable/c/0df50d47d17401f9f140dfbe752a65e5d72f9932Refgit.kernel.org/stable/c/dc09ef3562726cd520c8338c1640872a60187af5Refgit.kernel.org/stable/c/ff8de2cec65a8c8521faade12a31b39c80e49f5b

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47113?

CVE-2021-47113 is a high-severity vulnerability. It was published on March 15, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2021-47113?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47113?

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-2021-47113?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47113 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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