CVE-2018-12130

Public on 2019-05-07
Modified on 2019-08-27
Description
A flaw was found in the implementation of the "fill buffer", a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer.
Severity
Important
CVSS v3 Base Score
6.2
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 libvirt 2019-08-23 03:34 ALAS2-2019-1274
Amazon Linux 2 kernel 2019-05-07 22:39 ALAS2-2019-1205
Amazon Linux 1 qemu-kvm 2019-08-07 23:12 ALAS-2019-1260
Amazon Linux 1 kernel 2019-05-07 22:54 ALAS-2019-1205

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.2 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD CVSSv2 4.7 AV:L/AC:M/Au:N/C:C/I:N/A:N
NVD CVSSv3 5.6 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N