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CVE-2024-47724
published 2024-10-21

CVE-2024-47724: In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: use work queue to process beacon tx event Commit 3a415daa3e8b ("wifi: ath11k…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.34%
26.4th percentile
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: use work queue to process beacon tx event Commit 3a415daa3e8b ("wifi: ath11k: add P2P IE in beacon template") from Feb 28, 2024 (linux-next), leads to the following Smatch static checker warning: drivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie() warn: sleeping in atomic context The reason is that ath11k_bcn_tx_status_event() will directly call might sleep function ath11k_wmi_cmd_send() during RCU read-side critical sections. The call trace is like: ath11k_bcn_tx_status_event() -> rcu_read_lock() -> ath11k_mac_bcn_tx_event() -> ath11k_mac_setup_bcn_tmpl() …… -> ath11k_wmi_bcn_tmpl() -> ath11k_wmi_cmd_send() -> rcu_read_unlock() Commit 886433a98425 ("ath11k: add support for BSS color change") added the ath11k_mac_bcn_tx_event(), commit 01e782c89108 ("ath11k: fix warning of RCU usage for ath11k_mac_get_arvif_by_vdev_id()") added the RCU lock to avoid warning but also introduced this BUG. Use work queue to avoid directly calling ath11k_mac_bcn_tx_event() during RCU critical sections. No need to worry about the deletion of vif because cancel_work_sync() will drop the work if it doesn't start or block vif deletion until the running work is done. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30

Affected

10 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.11.2-1 (forky)linux 6.11.2-1 (forky)
linuxlinux
linuxlinux>= 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 < dbd51da69dda1137723b8f66460bf99a9dac8dd2dbd51da69dda1137723b8f66460bf99a9dac8dd2
linuxlinux>= 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 < 6db232905e094e64abff1f18249905d068285e096db232905e094e64abff1f18249905d068285e09
linuxlinux>= 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 < 177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3
linuxlinux_kernel>= 0 < 6.11.2-16.11.2-1
linuxlinux_kernel>= 0 < 6.11.2-16.11.2-1
linuxlinux_kernel>= 0 < 6.11.0-18.186.11.0-18.18
linuxlinux_kernel>= 6.10 < 6.10.136.10.13
linuxlinux_kernel>= 6.11 < 6.11.26.11.2

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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