View at Official suse advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2021-3418 severity moderate: SUSE including 9 source package names (grub2, grub2-arm64-efi, …), 199 product×package rows across 39 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (39 product lines)): Known Not Affected 199.
If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism.