CVE-2024-26897

2024-04-1700:00:00

ubuntu.com

linux kernel

vulnerability

wifi module

ath9k_wmi_event_tasklet

initialization

data structures

usb subsystem

null pointer dereference

synchronization

7.9 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.3%

JSON

In the Linux kernel, the following vulnerability has been resolved: wifi:
ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete The
ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data
structures have been fully initialised by the time it runs. However,
because of the order in which things are initialised, this is not
guaranteed to be the case, because the device is exposed to the USB
subsystem before the ath9k driver initialisation is completed. We already
committed a partial fix for this in commit: 8b3046abc99e (“ath9k_htc: fix
NULL pointer dereference at ath9k_htc_tx_get_packet()”) However, that
commit only aborted the WMI_TXSTATUS_EVENTID command in the event tasklet,
pairing it with an “initialisation complete” bit in the TX struct. It seems
syzbot managed to trigger the race for one of the other commands as well,
so let’s just move the existing synchronisation bit to cover the whole
tasklet (setting it at the end of ath9k_htc_probe_device() instead of
inside ath9k_tx_init()).

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-112.122UNKNOWN
ubuntu23.10noarchlinux< anyUNKNOWN
ubuntu24.04noarchlinux< 6.8.0-35.35UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1063.69UNKNOWN
ubuntu23.10noarchlinux-aws< anyUNKNOWN
ubuntu24.04noarchlinux-aws< 6.8.0-1009.9UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1063.69~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1066.75UNKNOWN
ubuntu23.10noarchlinux-azure< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-112.122	UNKNOWN
ubuntu	23.10	noarch	linux	< any	UNKNOWN
ubuntu	24.04	noarch	linux	< 6.8.0-35.35	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1063.69	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< any	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< 6.8.0-1009.9	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1063.69~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1066.75	UNKNOWN
ubuntu	23.10	noarch	linux-azure	< any	UNKNOWN