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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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Boot into recovery mode - Samsung oueui 3.0

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Working on Exynos S10 oneui 3.0

If you need to enter recovery/Twrp mode on your Samsung handset and on oneui 3.0 then you are going to need a PC

Turn off, or plug in the handset into PC, press and hold power, bixby & volume up to enter the recovery menu

If the bootloader is unlocked you can wait until the warning screen flashes then quickly let go of power keep holding bixby and volume up until your Samsung boots into Twrp , proceed with flashing, etc.

If you're having trouble, try holding power, bixby, volume down until the phone vibrates, quickly release volume down and hold volume up 




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