CVE-2022-50386

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: L2CAP: Fix user-after-free<br /> <br /> This uses l2cap_chan_hold_unless_zero() after calling<br /> __l2cap_get_chan_blah() to prevent the following trace:<br /> <br /> Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref<br /> *kref)<br /> Bluetooth: chan 0000000023c4974d<br /> Bluetooth: parent 00000000ae861c08<br /> ==================================================================<br /> BUG: KASAN: use-after-free in __mutex_waiter_is_first<br /> kernel/locking/mutex.c:191 [inline]<br /> BUG: KASAN: use-after-free in __mutex_lock_common<br /> kernel/locking/mutex.c:671 [inline]<br /> BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400<br /> kernel/locking/mutex.c:729<br /> Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389