and various Oppo devices when running automated wrappers such as mtk-easy-su . Understanding the mtk-su Architecture
If your device has a 2023, 2024, or newer security patch, mtk-su will likely not work.
A failure at specifically means the exploit was blocked during the memory modification phase. Top Causes for the Failure mtksu failed critical init step 3 best
Restart your Android device completely to release locked memory blocks.
Here is a comprehensive guide to understanding and fixing the error, with the best, most effective solutions for 2026. What Does "Failed Critical Init Step 3" Mean? and various Oppo devices when running automated wrappers
In simple terms, mtk-su is a clever piece of software that uses an exploit (CVE-2020-0069, a memory vulnerability in MediaTek drivers from 2019) to grant root access on devices with a locked bootloader. This error means that the very first checks the program performs to set up its environment have been blocked by the device's security system. It fails right at the start, before the program even gets a chance to run the actual exploit code.
What or security patch date is your device currently running? Top Causes for the Failure Restart your Android
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: Executing the script from folders without appropriate read/write/execute rights (like outside of /data/local/tmp ) triggers an instant failure.
: Open a terminal emulator on your device (download one from the Play Store if needed) or use ADB from your PC. Type the following command and press Enter:
Move to the directory and update permissions before running it: adb shell cd /data/local/tmp chmod 755 mtk-su ./mtk-su -v Use code with caution.
