Vulnerability CVE-2024-42132
Published: 2024-07-30

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

bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

Syzbot hit warning in hci_conn_del() caused by freeing handle that was
not allocated using ida allocator.

This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by
hci_le_big_sync_established_evt(), which makes code think it's unset
connection.

Add same check for handle upper bound as in hci_conn_set_handle() to
prevent warning.

 References:
https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4
https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5
https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23
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