CVE-2022-21772
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 type confusion 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: ALPS06493842; Issue ID: ALPS06493842.
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 confidenceThe TEEI (Trusted Execution Environment Interface) driver contains a type confusion vulnerability triggered by a race condition. An attacker with System-level privileges can exploit this race condition to achieve local privilege escalation, potentially gaining elevated access 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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Check Android versionRun 'getprop ro.build.version.release' or check Settings > About Phone > Android versionAffected if The version is 11.0 or 12.0 exactly
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Identify TEEI driver presenceCheck /proc/modules or /sys/module for 'teei' or 'teei_driver' entries using 'grep -i teei /proc/modules'Affected if The TEEI driver module is loaded on the device
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Verify TEEI driver configurationCheck /sys/kernel/debug/teei_debug or similar debug interfaces if available, or inspect kernel cmdline for teei parametersAffected if TEEI driver is enabled and actively initialized in the kernel
Affected if running Android 11.0 or 12.0 with the TEEI driver present and loaded on the device.
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 patch ALPS06493842 to the TEEI driver. Since the vulnerability requires System-level access to exploit, prioritize patching in environments where untrusted code runs at elevated privilege levels.
Android 11.0/12.0 with March 2022 Security Patch Level or later (containing MediaTek patch ALPS06493842)
- Check current Android security patch level: Go to Settings > About Phone > Security Patch Level
- Verify if your device has received the March 2022 Android Security Patch Level or later which contains the fix for CVE-2022-21772
- If available, apply any pending system updates through Settings > System > Software Update
- If the device manufacturer has not released an update containing patch ALPS06493842, consider upgrading to a device model that receives regular security updates
- For enterprise/managed devices, ensure Mobile Device Management (MDM) policies enforce automatic security updates
- Alternatively, contact the device manufacturer (OEM) to confirm when the patch ALPS06493842 will be available for your specific device model
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-21772 — 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-2022-21772 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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