feat(shim): Update shim to v16.1 w/ dual signatures#17921
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feat(shim): Update shim to v16.1 w/ dual signatures#17921corvus-callidus wants to merge 2 commits into
corvus-callidus wants to merge 2 commits into
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- Bump version to 16.1, reset release to 1 - Raise Conflicts to grub2-efi-binary < 2.06-27 (requires SBAT generation 5 support)
- Replace 15.8 binaries with separate MS-2011 and MS-2023 signed shim binaries - Update to new AZL-signed 16.1 mm efi binaries - Add verify_combine_sigs script to verify signatures against known Microsoft UEFI CA certs and combine them into one output binary
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Changes LGTM |
christopherco
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Jul 8, 2026
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Updates the shim package from 15.8-6 to 16.1-1 and switches to a dual-signed shim binary (signed by both the Microsoft UEFI CA 2011 and the Microsoft UEFI CA 2023 keys). This keeps Azure Linux 3.0 bootable on firmware that trusts either CA, easing the ecosystem transition to the 2023 CA while retaining 2011-CA compatibility.
What changed
shimx64.efi.signed.MS-2011,shimx64.efi.signed.MS-2023) are combined into a single dual-signed image viaverify_combine_sigs.Testing
Buddy build: Build 1151323
Manual testing:
db= 2023-only, 2011-only, or both CAs (Azure default), and neither.Addresses AB#22221