CVE-2022-3675

Security-fix rollback via missing boot-entry authorization

Published Nov 3, 2022 · Updated May 2, 2025

Authentication bypass in affected Fedora CoreOS 36 releases allows physically proximate attackers to boot an older OSTree deployment. Generated non-default boot-loader entries omit the grub_users setting that makes GRUB enforce the configured password. Access to the GRUB menu and an enabled bootloader password are required; exploitation rolls the host back to code lacking subsequently applied security fixes.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Fedora CoreOS 36 releases allows physically proximate attackers to boot an older OSTree deployment. Generated non-default boot-loader entries omit the grub_users setting that makes GRUB enforce the configured password. Access to the GRUB menu and an enabled bootloader password are required; exploitation rolls the host back to code lacking subsequently applied security fixes.

The record

CVE
CVE-2022-3675
Published
Nov 3, 2022
Updated
May 2, 2025
Vendor
Fedora Project
Product
Fedora CoreOS
Classifications
CWE-20, CWE-306
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2022CVE publishedPublication date reported by the CVE source.
  2. May 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=next 36.20220906.1.0 and later <next 37.20221031.1.0
  2. Affected versionversion=stable 36.20220820.3.0 and later <stable 36.20221014.3.0
  3. Affected versionversion=testing 36.20220906.2.0 and later <testing 36.20221030.2.0

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Fedora Project · Fedora CoreOSversion=next 36.20220906.1.0 and later <next 37.20221031.1.0; version=stable 36.20220820.3.0 and later <stable 36.20221014.3.0; version=testing 36.20220906.2.0 and later <testing 36.20221030.2.0

Published CVSS scores

2.6Fedora ProjectCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-306Missing Authentication for Critical Function

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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