: Sometimes the error is a temporary glitch. Try re-running the command to set permissions before executing the script: Use code with caution. Copied to clipboard Wait a few seconds and try running Downgrade Firmware
The most significant cause of the "failed critical init step 3" error stems from firmware security updates. Any firmware update released after March 2020 likely contains patches that block the vulnerability exploited by MTK-SU. This timing aligns with Google's monthly security patch updates, which typically addressed this specific MediaTek vulnerability.
“I reissued the chmod 755 mtk-su a third time and it eventually worked. i think chris says, he doesnt know why it happens but he did mention briefly that it does.” about.gitlab.com mtk-su failed critical init step 3
We can also walk through the exact steps to from your device's stock firmware, or troubleshoot any ADB communication errors you might be encountering. Share public link
The mtk-su tool is a specialized command-line binary developed by developer diplomatic on the XDA Forums . It targets a severe security vulnerability (CVE-2020-0069) found within the kernel drivers of several MediaTek (MTK) ARMv8 chipsets. The vulnerability allows a regular user application to read and write directly to physical memory addresses. : Sometimes the error is a temporary glitch
If you see this error message in your terminal or command prompt, your exploit attempt has failed. But understanding why this happens is the first step to potentially fixing it—or accepting the limitations of your device.
The memory of mtk-su lives on in XDA threads and archived ZIP files, but for the actively updated device, step 3 will remain forever incomplete. Any firmware update released after March 2020 likely
The mtk-su tool (MediaTek SuperUser), originally developed by developer diplomatic on the XDA Forums , is a popular tool designed to grant temporary root access. It operates on 64-bit MediaTek (ARMv8) processors by exploiting a critical security vulnerability known as .
: Updating your device's firmware will almost certainly patch the vulnerability. Any firmware update released after March 2020 is bound to block the method used by mtk-su . If you wish to continue using the exploit, avoid updating your device beyond the March 2020 security patch level.