CVE-2022-3675: Red Hat Fedora Coreos

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Fedora CoreOS supports setting a GRUB bootloader password using a Butane config. When this feature is enabled, GRUB requires a password to access the GRUB command-line, modify kernel command-line arguments, or boot non-default OSTree deployments. Recent Fedora CoreOS releases have a misconfiguration which allows booting non-default OSTree deployments without entering a password. This allows someone with access to the GRUB menu to boot into an older version of Fedora CoreOS, reverting any security fixes that have recently been applied to the machine. A password is still required to modify kernel command-line arguments and to access the GRUB command line.

Affected products

• Red Hat Fedora Coreos: from 36.20220820.3.0, before 37.20221031.1.0 (fixed in 37.20221031.1.0)

Published 2022-11-03. Last modified 2026-06-17.