CVE-2022-49942

published 2025-06-18

CVE-2022-49942: 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…

Priority P4 19 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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().

Affected

22 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.0.2-1 (bookworm)	linux 6.0.2-1 (bookworm)
linux	linux	—	—
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < cdb9a8da9b84800eb15506cd9363cf0cf059e677	cdb9a8da9b84800eb15506cd9363cf0cf059e677
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 1691a48aef0a82d1754b9853dae7e3f5cacdf70b	1691a48aef0a82d1754b9853dae7e3f5cacdf70b
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < d9eb37db6a28b59a95a3461450ee209654c5f95b	d9eb37db6a28b59a95a3461450ee209654c5f95b
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 66689c5c02acd4d76c28498fe220998610aec61e	66689c5c02acd4d76c28498fe220998610aec61e
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < dd649b49219a0388cc10fc40e4c2ea681566a780	dd649b49219a0388cc10fc40e4c2ea681566a780
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 552ba102a6898630a7d16887f29e606d6fabe508	552ba102a6898630a7d16887f29e606d6fabe508
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 864e280cb3a9a0f5212b16ef5057c4e692f7039d	864e280cb3a9a0f5212b16ef5057c4e692f7039d
linux	linux	>= cd7760e62c2ac8581f050b2d36501d1a60beaf83 < 15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0	15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0
linux	linux_kernel	—	—
linux	linux_kernel	>= 0 < 5.10.148-1	5.10.148-1
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 0 < 6.0.2-1	6.0.2-1
linux	linux_kernel	>= 3.13 < 4.9.328	4.9.328
linux	linux_kernel	>= 4.10 < 4.14.293	4.14.293
linux	linux_kernel	>= 4.15 < 4.19.258	4.19.258
linux	linux_kernel	>= 4.20 < 5.4.213	5.4.213
linux	linux_kernel	>= 5.11 < 5.15.66	5.15.66
linux	linux_kernel	>= 5.16 < 5.19.8	5.19.8
linux	linux_kernel	>= 5.5 < 5.10.142	5.10.142

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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