An issue was discovered in the Linux kernel before 5.0.5. There is a use-after-free issue when hci_uart_register_dev() fails in hci_uart_set_proto() in drivers/bluetooth/hci_ldisc.c.
https://security.netapp.com/advisory/ntap-20191004-0001/
https://seclists.org/bugtraq/2020/Jan/10
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
https://github.com/torvalds/linux/commit/56897b217a1d0a91c9920cb418d6b3fe922f590a
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.5
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html