: Tells the bootloader to ignore the signature checks for the boot partition (kernel), vendor , and other partitions. When to Use the vbmeta Disable Command
Disabling Android's Verified Boot (AVB) requires flashing a modified vbmeta partition with specific flags. If you attempt to flash custom binaries—like a rooted boot image, custom recovery, or Custom ROM—without turning off this verification, your device will trigger a bootloop or display a "破坏" (destroyed) system error.
To bypass this security check, you must use the fastboot --disable-verification flash vbmeta vbmeta.img command. This comprehensive guide explains what this command does, why it is necessary, and how to execute it safely. Understanding AVB and vbmeta What is Android Verified Boot (AVB)?
Instructs the bootloader to ignore cryptographic hash mismatches in sub-partitions.
The primary users of this command are developers, security researchers, and enthusiasts engaging in Android customization. vbmeta disable-verification command
Now for the main event. The most direct way to disable AVB is by using Fastboot, a protocol used to flash partitions on Android devices.
fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img
fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img Use code with caution. Command Breakdown: fastboot : Invokes the flashing tool.
A: No. A factory reset wipes user data, but it does not re-flash the vbmeta partition. Once you flash a vbmeta with the disable flags, the change is permanent until you manually re-flash a stock vbmeta image. : Tells the bootloader to ignore the signature
You must unlock your bootloader first (usually via fastboot oem unlock or fastboot flashing unlock , depending on the manufacturer). Safety and Security Risks
The vbmeta.img file used does not match your exact system software version, or you forgot to wipe user data ( fastboot -w ).
Disabling Android Verified Boot dismantles the core security model of your device. It is not a decision to be taken lightly.
If you have modified your system (e.g., patched the boot image for root), the signatures , resulting in a boot loop or a "Device is corrupted" warning. Why Use the disable-verification Command? To bypass this security check, you must use
The vbmeta (Verified Boot Metadata) partition is the central hub for this verification process. It contains: Cryptographic public keys for signature verification. Hash descriptors for smaller partitions. Integrity metadata for the entire OS.
: You must download the exact stock firmware matching your phone's current software version and extract the vbmeta.img file.
When you disable verification on the vbmeta partition, you break the chain of trust for stock over-the-air (OTA) updates. In most cases, the device will refuse to install official updates unless the vbmeta partition is restored to its stock state.
While the two-flag command is the standard, you may encounter scenarios requiring slightly different syntax: