In the Linux kernel before 5.1.6, there is a use-after-free in serial_ir_init_module() in drivers/media/rc/serial_ir.c.
https://security.netapp.com/advisory/ntap-20200924-0005/
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.6
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html