The default OCI linux spec in oci/defaults{_linux}.go in Docker/Moby from 1.11 to current does not block /proc/acpi pathnames. The flaw allows an attacker to modify host's hardware like enabling/disabling bluetooth or turning up/down keyboard brightness.
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00084.html
https://access.redhat.com/errata/RHBA-2018:2796
https://access.redhat.com/errata/RHSA-2018:2482
https://access.redhat.com/errata/RHSA-2018:2729