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The June 2026 Secure Boot Certificate Expiry: What You Need to Know

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If you dual-boot or run a Linux distribution with Secure Boot enabled, you may have heard about a major security deadline. The original Microsoft 2011 UEFI Third-Party Certificate Authority (CA) keys, which most Linux distributions rely on to sign their initial bootloaders (shim) on consumer PC hardware, expired at the end of June 2026 The expiration of a certificate doesn't invalidate already-installed, signed binaries on your system; firmware doesn't check expiration dates at boot time. However, moving forward, future Linux bootloader updates and security patches will be signed exclusively using the new Windows UEFI CA 2023 key . If your motherboard's firmware database isn't updated to trust this new 2023 key, your Linux system may eventually experience package management blocks or fail to apply critical bootloader updates. Before running updates, check if Secure Boot is active and see if your system already recognizes the 2023 certificate hierarchy. Open your termi...
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TWRP for s10 [exynos][updated]

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Odin

                                                                             TWRP

                                                                            vbmeta

                                                                        multidisabler


Put the multidisabler zip file on external storage as we're going to format data 

With the device powered off hold volume down, power and Bixby with the phone plugged into USB cable connected to PC to boot into download mode 


Make sure USB debugging is enabled ,about phone, software information, tap build number several times to enable developer options, USB debugging



Long press volume up to unlock bootloader

Open  Odin , connect phone to USB cable , make sure it says 'connected' in Odin

In the AP tab browse to TWRP.tar 

In the CP tab browse to vbmeta.tar 

Tap start 

Immediately hold power, volume up and Bixby to boot straight into TWRP recovery , but let go of power when the phone vibrates

Format data 

In the wipe menu navigate to advanced wipe, format data , type - yes 

Flash the multidisabler.zip


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