CVE-2022-28735: GNU GRUB2

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

Affected products

• GNU GRUB2: from 2.00, before 2.06-3 (fixed in 2.06-3)

Published 2023-07-20. Last modified 2026-06-17.