CVE-2024-36012

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: msft: fix slab-use-after-free in msft_do_close()

Tying the msft->data lifetime to hdev by freeing it in

hci_release_dev() to fix the following case:

[use]

msft_do_close()

msft = hdev->msft_data;

if (!msft) ...(1) <- passed.

return;

mutex_lock(&msft->filter_lock); ...(4) <- used after freed.

[free]

msft_unregister()

msft = hdev->msft_data;

hdev->msft_data = NULL; ...(2)

kfree(msft); ...(3) <- msft is freed.

==================================================================

BUG: KASAN: slab-use-after-free in __mutex_lock_common

kernel/locking/mutex.c:587 [inline]

BUG: KASAN: slab-use-after-free in __mutex_lock+0x8f/0xc30

kernel/locking/mutex.c:752

Read of size 8 at addr ffff888106cbbca8 by task kworker/u5:2/309