Linux Kernel up to 5.19.7 wifi net/wireless/scan.c cfg80211_get_bss state issue

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.19.7. Affected is the function cfg80211_get_bss of the file net/wireless/scan.c of the component wifi. Performing a manipulation results in state issue. This vulnerability is reported as CVE-2022-49942. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.19.7. It has been classified as problematic. This affects the function cfg80211_get_bss of the file net/wireless/scan.c of the component wifi. The manipulation with an unknown input leads to a state issue vulnerability. CWE is classifying the issue as CWE-371. The impact remains unknown. The summary by CVE is:

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().

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2022-49942 since 06/18/2025. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/30/2025).

The vulnerability scanner Nessus provides a plugin with the ID 249961 (Linux Distros Unpatched Vulnerability : CVE-2022-49942), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.142, 5.15.66 or 5.19.8 eliminates this vulnerability. Applying the patch cdb9a8da9b84800eb15506cd9363cf0cf059e677/1691a48aef0a82d1754b9853dae7e3f5cacdf70b/d9eb37db6a28b59a95a3461450ee209654c5f95b/66689c5c02acd4d76c28498fe220998610aec61e/dd649b49219a0388cc10fc40e4c2ea681566a780/552ba102a6898630a7d16887f29e606d6fabe508/864e280cb3a9a0f5212b16ef5057c4e692f7039d/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (249961) and CERT Bund (WID-SEC-2025-1350). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source Linux Kernel
• RESF Rocky Linux
• Dell Avamar
• Dell NetWorker
• Dell Secure Connect Gateway
• IBM QRadar SIEM

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.9.327
• 4.14.292
• 4.19.257
• 5.4.212
• 5.10.141
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.15.56
• 5.15.57
• 5.15.58
• 5.15.59
• 5.15.60
• 5.15.61
• 5.15.62
• 5.15.63
• 5.15.64
• 5.15.65
• 5.19.0
• 5.19.1
• 5.19.2
• 5.19.3
• 5.19.4
• 5.19.5
• 5.19.6
• 5.19.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

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