CVE-2020-15437

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

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Severity

Moderate

Red Hat Product Security

4.4

CVSS 3.1

Review impact separately from score.

Published · July 21, 2020

Updated · June 28, 2026

Description

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 vulnerability is to system availability.

Statement

This flaw is rated as having a Moderate impact because the issue can only be triggered by an authorized local user in the tty or in the dialout group.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.4
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference