CVE-2020-15437: Linux Kernel

Medium severity, CVSS 4.4. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: before 5.8 (fixed in 5.8)

Published 2020-11-23. Last modified 2026-06-17.