CVE-2024-26897

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nwifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete\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.\nWe already committed a partial fix for this in commit:\n8b3046abc99e ('ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()')\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's 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()).

See more information about CVE-2024-26897 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.1	CVSS Vector:	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	High
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-3618	2024-06-05
Oracle Linux version 9 (kernel)	ELSA-2024-5363	2024-08-14