Security-Enhanced Linux (SELinux) on modern Android versions actively prevents unauthorized processes from gaining elevated privileges. When SELinux is set to "enforcing" mode, it can block MTK-SU's exploit attempts, resulting in the initialization failure.
If you are using the MTK Easy SU app from GitHub , a corrupted "asset" or configuration can cause initialization failures. Go to . Select Clear Data and Clear Cache .
If mtk-su is permanently patched on your firmware and you cannot downgrade, the development community has built newer, more powerful tools that bypass OS-level patches entirely by targeting the boot ROM (BROM) hardware layer.
On certain Amazon Fire devices, when mtk-su fails, there is sometimes a hardware-based unlock method involving shorting specific test points on the device’s motherboard. This is an advanced solution but may be the only option for some devices. One user reported: “I ended up doing the hardware setup instead… You need to ground that pin to the back board”.
chmod 755 mtk-su ./mtk-su -v
ZTE Blade A7 Prime users have reported seeing the error message "armv71 machine Failed critical init step 1" when launching the mtk-su -v command, indicating that the exploit no longer works on their devices, likely due to security patches.
Go to .
Settings > About Tablet/Phone > Android Security Patch Level
If you're using an automated installer, try a manual installation if possible.
: Before accepting any system update, verify whether it will affect your rooting status by checking community forums for your specific device model.
Run getprop ro.build.version.sdk and uname -a . mtk-su works best on Android ≤10 (SDK 29) . Android 11+ usually fails.
Locate the official, signed factory firmware image matching your exact hardware model SKU from a trusted repository.
This is by far the most common cause. mtk-su was designed to work on devices with security patches . Google and MediaTek officially patched CVE-2020-0069 in the March 2020 Android Security Bulletin.
Mtk-su Failed Critical Init Step 3 -
Security-Enhanced Linux (SELinux) on modern Android versions actively prevents unauthorized processes from gaining elevated privileges. When SELinux is set to "enforcing" mode, it can block MTK-SU's exploit attempts, resulting in the initialization failure.
If you are using the MTK Easy SU app from GitHub , a corrupted "asset" or configuration can cause initialization failures. Go to . Select Clear Data and Clear Cache .
If mtk-su is permanently patched on your firmware and you cannot downgrade, the development community has built newer, more powerful tools that bypass OS-level patches entirely by targeting the boot ROM (BROM) hardware layer.
On certain Amazon Fire devices, when mtk-su fails, there is sometimes a hardware-based unlock method involving shorting specific test points on the device’s motherboard. This is an advanced solution but may be the only option for some devices. One user reported: “I ended up doing the hardware setup instead… You need to ground that pin to the back board”. mtk-su failed critical init step 3
chmod 755 mtk-su ./mtk-su -v
ZTE Blade A7 Prime users have reported seeing the error message "armv71 machine Failed critical init step 1" when launching the mtk-su -v command, indicating that the exploit no longer works on their devices, likely due to security patches.
Go to .
Settings > About Tablet/Phone > Android Security Patch Level
If you're using an automated installer, try a manual installation if possible.
: Before accepting any system update, verify whether it will affect your rooting status by checking community forums for your specific device model. On certain Amazon Fire devices, when mtk-su fails,
Run getprop ro.build.version.sdk and uname -a . mtk-su works best on Android ≤10 (SDK 29) . Android 11+ usually fails.
Locate the official, signed factory firmware image matching your exact hardware model SKU from a trusted repository.
This is by far the most common cause. mtk-su was designed to work on devices with security patches . Google and MediaTek officially patched CVE-2020-0069 in the March 2020 Android Security Bulletin. : Before accepting any system update