Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: usb: schedule rx work after everything is set up Right now it's possible to hit NULL pointer dereference in rtw_rx_fill_rx_status on hw object and/or its fields because initialization routine can start getting USB replies before rtw_dev is fully setup. The stack trace looks like this: rtw_rx_fill_rx_status rtw8821c_query_rx_desc rtw_usb_rx_handler ... queue_work rtw_usb_read_port_complete ... usb_submit_urb rtw_usb_rx_resubmit rtw_usb_init_rx rtw_usb_probe So while we do the async stuff rtw_usb_probe continues and calls rtw_register_hw, which does all kinds of initialization (e.g. via ieee80211_register_hw) that rtw_rx_fill_rx_status relies on. Fix this by moving the first usb_submit_urb after everything is set up. For me, this bug manifested as: [ 8.893177] rtw_8821cu 1-1:1.2: band wrong, packet dropped [ 8.910904] rtw_8821cu 1-1:1.2: hw->conf.chandef.chan NULL in rtw_rx_fill_rx_status because I'm using Larry's backport of rtw88 driver with the NULL checks in rtw_rx_fill_rx_status.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e3037485c68ec1a299ff41160d8fedbd4abc29b9 before c83d464b82a8ad62ec9077637f75d73fe955635a; affected e3037485c68ec1a299ff41160d8fedbd4abc29b9 before 25eaef533bf3ccc6fee5067aac16f41f280e343e; affected e3037485c68ec1a299ff41160d8fedbd4abc29b9 before adc539784c98a7cc602cbf557debfc2e7b9be8b3 |
| Linux / Linux | affected 5.2; unaffected 0 before 5.2; unaffected 6.6.51 through 6.6.*; unaffected 6.10.10 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c83d464b82a8ad62ec9077637f75d73fe955635a
- https://git.kernel.org/stable/c/25eaef533bf3ccc6fee5067aac16f41f280e343e
- https://git.kernel.org/stable/c/adc539784c98a7cc602cbf557debfc2e7b9be8b3
ADP enrichment
No English description supplied.
No references supplied.