https://source.android.com/security/bulletin/2018-08-01 CVE-2017-18249* CVE-2018-9465 CVE-2018-9439 CVE-2018-1068 * currently no 4.4 backports exist for CVE-2017-18249 on android-4.4 release branches. This affects only devices using f2fs running 4.4 kernels.