CVE-2020-12888

Public on 2020-10-26
Modified on 2020-10-27
Description
A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access the read/write devices' MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal error condition, crashing the system. This flaw allows a guest user or process to crash the host system resulting in a denial of service.
Severity
Important
CVSS v3 Base Score
5.3
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2020-10-26 18:08 ALAS-2020-1437

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD CVSSv2 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C
NVD CVSSv3 5.3 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H