cve-2024-26897
Vulnerability from cvelistv5
Published
2024-04-17 10:27
Modified
2024-11-05 09:17
Severity ?
EPSS score ?
Summary
wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete
References
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete\n\nThe ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data\nstructures have been fully initialised by the time it runs. However, because of\nthe order in which things are initialised, this is not guaranteed to be the\ncase, because the device is exposed to the USB subsystem before the ath9k driver\ninitialisation is completed.\n\nWe already committed a partial fix for this in commit:\n8b3046abc99e (\"ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()\")\n\nHowever, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event\ntasklet, pairing it with an \"initialisation complete\" bit in the TX struct. It\nseems syzbot managed to trigger the race for one of the other commands as well,\nso let\u0027s just move the existing synchronisation bit to cover the whole\ntasklet (setting it at the end of ath9k_htc_probe_device() instead of inside\nath9k_tx_init())."
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