CVE-2020-15437 Null dereference in linux kernel

What is CVE-2020-15437?

CVE-2020-15437 is a medium-severity vulnerability in Linux kernel, published on 23 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2020-15437?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2020-15437?

Upgrade to a fixed version.

Is CVE-2020-15437 being exploited?

There is no known exploitation of CVE-2020-15437 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-15437, GHSA-mx68-p244-fggc, UBUNTU-CVE-2020-15437.