CVE-2022-20006
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn several functions of KeyguardServiceWrapper.java and related files,, there is a possible way to briefly view what's under the lockscreen due to a race condition. This could lead to local escalation of privilege if a Guest user is enabled, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12LAndroid ID: A-151095871
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA race condition in Android's KeyguardServiceWrapper allows a local attacker with Guest user access to briefly view content behind the lockscreen without authentication. The vulnerability stems from improper synchronization during lock screen state transitions, enabling a time-of-check-to-time-of-use (TOCTOU) issue where screen content can be exposed before the keyguard is fully engaged.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 10.0= 11.0= 12.0= 12.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check Android OS versionRun 'getprop ro.build.version.release' via ADB or check Settings > About Phone > Android versionAffected if Version equals 10.0, 11.0, 12.0, or 12.1
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Verify Guest user account existsRun 'pm list users' via ADB or check Settings > Users & accounts to confirm a Guest user profile is availableAffected if A Guest user account is present and accessible on the device
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Confirm lock screen is configuredCheck Settings > Security > Screen lock is set to PIN, pattern, or password, or verify via 'settings get secure lock_screen_locked'Affected if Lock screen is enabled and set to an authentication method
A device is affected if it runs Android 10.0, 11.0, 12.0, or 12.1, has a Guest user account available, and has a lock screen configured, as the race condition only triggers during lock screen state transitions with Guest user access.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedApply the vendor-provided Android security patch containing the fix for A-151095871, which corrects the race condition in KeyguardServiceWrapper.java through proper synchronization of lock screen state transitions.
Android 13 or later (or apply the February 2022 security patch level)
- Upgrade the device to Android 13 or later, which contains the fix for this race condition in KeyguardServiceWrapper
- If upgrading is not possible, ensure the device receives the latest monthly security patch from the device manufacturer
- Verify that Guest user access is disabled in Settings > Users to reduce the attack surface for this privilege escalation vulnerability
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20006 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-20006 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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