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CVE-2021-47194

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL8021…

Published Apr 10, 2024CWE-665EPSS 0.25%

Overview

CVE-2021-47194 is a high-severity vulnerability. It was published on April 10, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

cfg80211: call cfg80211_stop_ap when switch from P2P_GO type

If the userspace tools switch from NL80211_IFTYPE_P2P_GO to

NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it

does not call the cleanup cfg80211_stop_ap(), this leads to the

initialization of in-use data. For example, this path re-init the

sdata->assigned_chanctx_list while it is still an element of

assigned_vifs list, and makes that linked list corrupt.

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/0738cdb636c21ab552eaecf905efa4a6070e3ebcRefgit.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21Refgit.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13Refgit.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2Refgit.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93ddRefgit.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66Refgit.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24Refgit.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddecRefgit.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebcRefgit.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47194?

CVE-2021-47194 is a high-severity vulnerability. It was published on April 10, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47194?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2021-47194?

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-2021-47194?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47194 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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