CVE - CVE-2022-49942

CVE-ID
CVE-2022-49942	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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().
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0 URL:https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0 MISC:https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b URL:https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b MISC:https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508 URL:https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508 MISC:https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e URL:https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e MISC:https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d URL:https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d MISC:https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677 URL:https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677 MISC:https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b URL:https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b MISC:https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780 URL:https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780
Assigning CNA
kernel.org
Date Record Created
20250618	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250618)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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