Google has released the May 2025 security update for Pixel devices, which crucially includes a bootloader with an updated anti-rollback threshold on certain devices, meaning users cannot revert to older firmware once installed.
What is Anti-Rollback Protection?
Anti-rollback protection is a security feature that prevents users from downgrading to older versions of firmware that may contain known security vulnerabilities. Once a device is updated past a certain threshold, it cannot be rolled back to earlier versions.
Which Devices Are Affected?
The May 2025 update includes an updated anti-rollback bootloader for the following devices:
- Pixel 6 series
- Pixel 7 series
- Pixel 8 series
- Pixel 9 series
This means once you install the May update on these devices, you won't be able to flash older firmware versions.
Why Does Google Do This?
Google implements anti-rollback protection to:
- Enhance Security: Prevent attackers from exploiting known vulnerabilities in older firmware
- Protect User Data: Ensure users can't accidentally or maliciously downgrade to insecure versions
- Maintain System Integrity: Keep devices running secure and up-to-date software
What This Means for Users
Regular Users
For most users, this change won't affect daily usage. Your device will continue to receive updates normally, and the anti-rollback protection works silently in the background to keep your device secure.
Power Users and Developers
If you frequently flash custom ROMs or test different firmware versions, you should:
- Back up important data before updating
- Understand that downgrading won't be possible after installing the May update
- Test thoroughly before committing to the update if you rely on specific firmware versions
Security Patches Included
The May 2025 security update addresses several vulnerabilities:
- Critical security patches for Android OS
- Pixel-specific vulnerability fixes
- Enhanced system security improvements
How to Install the Update
- Go to Settings > System > System Update
- Tap Check for update
- If available, download and install the May 2025 update
- Restart your device when prompted
Conclusion
While the anti-rollback bootloader may limit flexibility for some users, it's a crucial security measure that protects the vast majority of Pixel users from potential threats. Google continues to prioritize security alongside functionality, making Pixel devices among the most secure Android phones available.
If you're a regular user, we recommend installing the update as soon as possible to ensure your device remains secure. Power users should carefully consider their needs before updating.
