SARA / Free Tools / CVE / CVE-2022-3675

CVE-2022-3675 — Fedora CoreOS supports setting a GRUB bootloader password using a Butane config

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 hav

CVSS
2.6 LOW
EPSS
0.05% (top 85.00%)
CWE
CWE-20
Published
2022-11-03T17:25:02.823Z
Last modified
2025-05-02T18:53:10.153Z
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

01What is this vulnerability?

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…

02Affected products

VendorProductVersions
Fedora ProjectCoreOStesting 36.20220906.2.0 and later, next 36.20220906.1.0 and later, stable 36.20220820.3.0 and later

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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