CVE-2022-49942

UNKNOWN 0.0

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

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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().

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Jun 18, 2025
Last Updated	May 11, 2026

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Affected Versions

Linux / Linux

cd7760e62c2ac8581f050b2d36501d1a60beaf83 < cdb9a8da9b84800eb15506cd9363cf0cf059e677 cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 1691a48aef0a82d1754b9853dae7e3f5cacdf70b cd7760e62c2ac8581f050b2d36501d1a60beaf83 < d9eb37db6a28b59a95a3461450ee209654c5f95b cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 66689c5c02acd4d76c28498fe220998610aec61e cd7760e62c2ac8581f050b2d36501d1a60beaf83 < dd649b49219a0388cc10fc40e4c2ea681566a780 cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 552ba102a6898630a7d16887f29e606d6fabe508 cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 864e280cb3a9a0f5212b16ef5057c4e692f7039d cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0

Linux / Linux

3.13

References

NVD ↗ CVE.org ↗ EPSS Data ↗