Mtk-su Failed Critical Init Step 3 |work|

adb shell getprop ro.product.cpu.abi

: While compatibility issues can cause this error, most MediaTek devices released before 2020 are technically vulnerable to CVE-2020-0069. The error more often indicates that the security patch for the vulnerability has been applied, rather than that the chipset itself is incompatible. Check your security patch date before concluding incompatibility.

uname -m

Some users have reported success using different versions of the mtk-su binary. Check XDA threads for the latest available versions, particularly builds that may have been updated to support slightly newer firmware. Version 23 was known to work up to “OS 5.6.4.0 build 636558520”. mtk-su failed critical init step 3

Unlocking the bootloader and flashing Magisk.

Android security policies forbid executing files out of standard storage directories like /sdcard . If mtk-su is executed from an unprivileged folder, it will fail to read, write, or initialize memory spaces correctly. 4. Architecture Mismatch

If mtk-su fails at step 3, try:

Check for verified boot / AVB / dm-verity

If the standalone mtk-su binary continues to fail, consider using a wrapper tool or alternative method:

This article provides a deep dive into what this error means, why it happens, and how to troubleshoot it. What is mtk-su ? adb shell getprop ro

This flaw is a security vulnerability in the MediaTek command queue driver ( /dev/mtk_cmdq ). It allowed any standard application running on the device to read and write directly to arbitrary physical memory addresses. By rewriting kernel structures in memory, mtk-su elevates its privileges to root ( UID 0 ) without needing to unlock the device's bootloader. What Causes "Failed Critical Init Step 3"?

| Cause | Explanation | |-------|-------------| | | mtk-su works reliably only on patches before mid-2019 (some versions work up to early 2020). | | Wrong architecture | Using ARM64 version on an ARMv7 or x86 device. | | Kernel command line restrictions | Some kernels block the exploit method. | | SELinux enforcing | Not the main issue here, but can affect later steps. |