Amazon’s new Kindle lineup is locked with those crummy locked bootloaders. I know, you’re probably sad, but what if I told you there was a way to root it still? A post mentioned that this bootloader would most likely not prevent the new devices from being rooted due to a method getting past those bootloaders was already being developed. This method may have sounded weird at first, but it’s been confirmed and the root for your new Kindle Fire HD is already ready to go with this method. Before trying this method out though, you should know that it is confirmed this will work on the Kindle Fire HD 7, but should also work on the other variants based around Android 4.0 Ice Cream Sandwich.
Also, this exploit is actually based off one of the exploits that was found on the Transformer Prime tablet in the ICS update by sparkym3. That said, he should get full credit for this.
Before we start off, you need to download the following file:
After that file is finished downloading, you’re going to need to extract all of its contents and pull SU from /system/bin and SuperUser.apk from /system/app/ and then put them in the directory that you will be working out of. After all of that’s done, we just have a fairly easy step left to go through and shouldn’t take a genius to complete.
Just execute these following commands:
After that, execute the following commands:
ln -s /data/ /data/local/tmp
echo ‘ro.kernel.qemu=1’ > /data/local.prop
adb shell mount -o remount,rw /system
adb push su /system/xbin/su
chown 0.0 /system/xbin/su
chmod 06755 /system/xbin/su
adb install Superuser.apk
After these steps you should have the root access you were looking for.
source: Android Police (thank you AP for sharing these steps!)