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Medium severity6.4NVD Advisory· Published Mar 15, 2021· Updated Jun 17, 2026

CVE-2021-3418

CVE-2021-3418

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • GNU/Grub2
    cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*
    Range: <2.06
  • grub2/grub2description
  • Grub/Grub2llm-fuzzy
    Range: <2.06

Patches

Vulnerability mechanics

References

1

News mentions

0

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