CVE-2025-40283
Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
06 Dec 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
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