kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c

A NULL pointer dereference flaw was found in the Linux kernel’s UART 8250 functionality, in the way certain hardware architectures handled situations where default ports 0x2E8, 0x2F8, 0x3E8, 0x3F8 are not available. This flaw allows a local user to crash the system. The highest threat from this...