The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15437
Reference (s):
- https://lkml.org/lkml/2020/7/21/80
- URL: https://lkml.org/lkml/2020/7/21/80