Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 96% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF
There is a KASAN: slab-use-after-free read in btusb_disconnect().
Calling "usb_driver_release_interface(&btusb_driver, data->intf)" will
free the btusb data associated with the interface. The same data is
then used later in the function, hence the UAF.
Fix by moving the accesses to btusb data to before the data is free'd.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/1c28c1e1522c773a94e26950ffb145e88cd9834bhttps://git.kernel.org/stable/c/23d22f2f71768034d6ef86168213843fc49bf550https://git.kernel.org/stable/c/297dbf87989e09af98f81f2bcb938041785557e8https://git.kernel.org/stable/c/5dc00065a0496c36694afe11e52a5bc64524a9b8https://git.kernel.org/stable/c/7a6d1e740220ff9dfcb6a8c994d6ba49e76db198https://git.kernel.org/stable/c/95b9b98c93b1c0916a3d4cf4540b7f5d69145a0dhttps://git.kernel.org/stable/c/a2610ecd9fd5708be8997ca8f033e4200c0bb6afhttps://git.kernel.org/stable/c/f858f004bc343a7ae9f2533bbb2a3ab27428532f