Android 6.x before 2016-08-01 allows attackers to cause a denial of service (loss of locked-screen 911 functionality) via a crafted application that uses the app-pinning feature, aka internal bug 28761672.Referenceshttp://source.android.com/security/bulletin/2016-08-01.htmlhttps://android.googlesource.com/platform/frameworks/base/+/468651c86a8adb7aa56c708d2348e99022088af3http://www.securityfocus.com/bid/92244