CVE-2020-12657

Public on 2020-05-11
Modified on 2020-07-15
Description
A flaw was found in the Linux kernel's implementation of the BFQ IO scheduler. This flaw allows a local user able to groom system memory to cause kernel memory corruption and possible privilege escalation by abusing a race condition in the IO scheduler.
Severity
Important
CVSS v3 Base Score
7.0
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 kernel 2020-06-16 18:21 ALAS2-2020-1440
Amazon Linux 1 kernel 2020-06-23 06:02 ALAS-2020-1382
Amazon Linux 1 kernel 2020-05-11 20:43 ALAS-2020-1366
Amazon Linux 1 kernel 2020-06-23 06:02 ALAS-2020-1382
Amazon Linux 1 kernel 2020-05-11 20:43 ALAS-2020-1366

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H