What is CVE-2022-3675?

CVE-2022-3675 is a low-severity vulnerability in Fedora Project Coreos, classified under Improper Input Validation. CVSS score: 2.6/10. Published 2022-11-03.

How severe is CVE-2022-3675?

Low severity. CVSS v3 base score is 2.6 out of 10.

Auth bypass in Fedora Project Coreos

CVE-2022-3675

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2022-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (6.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Fedora Project Coreos — versions testing 36.20220906.2.0 and later, next 36.20220906.1.0 and later, stable 36.20220820.3.0 and later
Red Hat Fedora Coreos

Weakness classification (CWE)

References

github.com/coreos/fedora-coreos-tracker/issues/1333 (issue-tracking, Third Party Advisory, Issue Tracking)
lists.fedoraproject.org/archives/list/coreos-status@lists.fedoraproject.org/thr… (release-notes, Mailing List, Vendor Advisory)
docs.fedoraproject.org/en-US/fedora-coreos/grub-password/ (related, Vendor Advisory)

Frequently asked questions

What is CVE-2022-3675?: CVE-2022-3675 is a low-severity vulnerability in Fedora Project Coreos, classified under Improper Input Validation. CVSS score: 2.6/10. Published 2022-11-03.
How severe is CVE-2022-3675?: Low severity. CVSS v3 base score is 2.6 out of 10.