CVE-2022-21773
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 TEEI driver, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS06641388; Issue ID: ALPS06641388.
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 · moderate confidenceA use-after-free vulnerability exists in the TEEI (Trusted Execution Environment Interface) driver due to a race condition. This local privilege escalation flaw allows an attacker with System execution privileges to potentially exploit the memory management issue without user interaction.
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= 11.0= 12.0CVSS 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
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/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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Identify Android versionCheck the device settings under 'About Phone' or run 'getprop ro.build.version.release' via ADB shell to determine the installed Android versionAffected if The version is 11.0 or 12.0 exactly (note: only exact versions = 11.0 and = 12.0 are affected, not ranges)
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Locate TEEI driver moduleSearch for TEEI-related kernel modules or drivers in /vendor/lib/modules/, /system/lib/modules/, or check 'lsmod' output in ADB shell for teei or TEEI-related modulesAffected if A TEEI driver module is loaded on the system
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Verify TEEI driver is activeCheck if the TEEI driver is enumerated and active by examining /dev/teei* device nodes or using 'getprop' to query tee* related system propertiesAffected if TEEI device nodes or services exist and are operational
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Check for system-level accessConfirm the potential attacker context by verifying whether untrusted applications can obtain System execution privileges through ADB or existing privilege escalation pathsAffected if The device allows apps to attain System-level privileges (this is the prerequisite privilege level for exploitation)
Affected if the device runs Android 11.0 or 12.0 exactly AND has the TEEI driver enabled/loaded, since the use-after-free race condition exists specifically in the TEEI driver at these versions.
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.
From vendor dataApply patch ALPS06641388 to address the race condition and use-after-free in the TEEI driver, or update to the latest software version containing this fix.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-21773 — 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-2022-21773 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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