efi/preinstall: Add the Microsoft 2023 option ROM UEFI CA#507
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chrisccoulson merged 1 commit intocanonical:masterfrom Feb 13, 2026
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The 2023 UEFI CAs have been split into one that is used to sign boot code, and one that is used to sign option ROMs. Although what they sign isn't audit-able, knowing this allows us to optimise PCR selection a bit: - Because the 2023 UEFI CA is only used to sign boot code, we can mark it trusted for signing drivers, which means its use doesn't require us to lock policies to PCR2. - Because the 2023 option ROM UEFI CA is only used to sign option ROMs, we can mark it trusted for signing boot code, which means its use doesn't require us to lock policies to PCR4. Fixes: FR-12523
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The 2023 UEFI CAs have been split into one that is used to sign boot
code, and one that is used to sign option ROMs. Although what they sign
isn't audit-able, knowing this allows us to optimise PCR selection a
bit:
it trusted for signing drivers, which means its use doesn't require us
to lock policies to PCR2.
we can mark it trusted for signing boot code, which means its use
doesn't require us to lock policies to PCR4.
Fixes: FR-12523