A heap overflow flaw was found in the Linux kernel, all versions 3.x.x and
4.x.x before 4.18.0, in Marvell WiFi chip driver. The vulnerability allows
a remote attacker to cause a system crash, resulting in a denial of
service, or execute arbitrary code. The highest threat with this
vulnerability is with the availability of the system. If code execution
occurs, the code will run with the permissions of root. This will affect
both confidentiality and integrity of files on the system.

It was discovered that a heap-based buffer overflow existed in the Marvell
WiFi-Ex Driver for the Linux kernel. A physically proximate attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code.