Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2022-49942

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected When we are not connected to a channel, sending channe…

Published Jun 18, 2025CWE-476EPSS 0.26%

Overview

CVE-2022-49942 is a medium-severity vulnerability. It was published on June 18, 2025 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:

wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected

When we are not connected to a channel, sending channel "switch"

announcement doesn't make any sense.

The BSS list is empty in that case. This causes the for loop in

cfg80211_get_bss() to be bypassed, so the function returns NULL

(check line 1424 of net/wireless/scan.c), causing the WARN_ON()

in ieee80211_ibss_csa_beacon() to get triggered (check line 500

of net/mac80211/ibss.c), which was consequently reported on the

syzkaller dashboard.

Thus, check if we have an existing connection before generating

the CSA beacon in ieee80211_ibss_finish_csa().

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/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0Refgit.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70bRefgit.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508Refgit.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61eRefgit.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039dRefgit.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677Refgit.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95bRefgit.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49942?

CVE-2022-49942 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49942?

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-2022-49942?

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-2022-49942?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49942 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.

Related MEDIUM CVEs from 2022

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999