If you are using an older version of the exploit, download the latest release (r23 or higher) from trusted sources like XDA Developers or the JunioJsv GitHub. 4. Disable Play Protect
When you run mtk-su via an ADB shell or automated apps like mtk-easy-su , the program executes a multi-stage initialization routine: Platform and architecture check. Step 2: Memory space scanning and base address hunting. Step 3: The Exploit Payload Injection (The Race Condition).
This error generally means that , and the vulnerability used by the script has been patched, preventing the script from hot-plugging the CPU to achieve root. 2. Common Causes
On many MTK boards, you can force BROM mode by shorting the CLK and CMD pins of the eMMC or the specific BROM_DISABLE test point. Look for schematics of your phone model (e.g., "Redmi 9T test points"). mtksu failed critical init step 3 hot
: If the system's SELinux is set to a strict "Enforcing" mode and the tool fails to switch it to "Permissive," the initialization will fail. Missing Assets
The mtk-su tool works by exploiting vulnerabilities in the MediaTek chipset driver to elevate privileges to root level ( uid 0 ) without unlocking the bootloader.
mtk-su -c --cold --step3-delay=500
: To achieve a temporary elevation of privileges to UID 0 (root) without unlocking the bootloader.
If you have followed these steps and still receive the "failed critical init step 3 hot" error, your device's firmware likely contains the . In this case, mtk-su will not work, and you may need to look into traditional rooting methods like unlocking the bootloader and flashing a patched boot image via Magisk Manager .
: Usually involves architecture identification and preliminary memory mapping. If you are using an older version of
During critical init step 3, the tool typically writes a small payload to SRAM or DRAM. In "hot" mode, certain memory regions are already protected by the memory management unit (MMU) or the preloader's watchdog timer. When MTK-SU attempts to write, the watchdog resets the device or the write is ignored, leading to a "failed" status.
Given the specificity and the somewhat unclear nature of the term, I'll guide you on how to approach finding information or a paper on this topic:
If a device has received a late-stage security patch that didn't entirely rewrite the driver code but modified how memory buffers allocate space, the exploit may struggle to stabilize. When combined with a hot processor, the success rate drops to zero. Step-by-Step Troubleshooting Checklist Step 2: Memory space scanning and base address hunting