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CVE-2021-47091

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mac80211: fix locking in ieee80211_start_ap error path We need to hold the local->mtx to release the channel context, as even e…

Published Mar 4, 2024CWE-667EPSS 0.17%

Overview

CVE-2021-47091 is a medium-severity vulnerability. It was published on March 4, 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:

mac80211: fix locking in ieee80211_start_ap error path

We need to hold the local->mtx to release the channel context,

as even encoded by the lockdep_assert_held() there. Fix it.

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/87a270625a89fc841f1a7e21aae6176543d8385cRefgit.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79Refgit.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44fRefgit.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385cRefgit.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79Refgit.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47091?

CVE-2021-47091 is a medium-severity vulnerability. It was published on March 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47091?

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-2021-47091?

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-2021-47091?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47091 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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