CVE-2022-21752
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 WLAN driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS06493873; Issue ID: ALPS06493873.
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 vulnerability in the WLAN driver allows an out-of-bounds write due to a missing bounds check. This enables local privilege escalation from a System-level execution context, requiring no user interaction for exploitation.
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 version numberRun `getprop ro.build.version.release` in a terminal or check Settings > About Phone > Android versionAffected if The version displayed is exactly 11.0 or 12.0
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Confirm WLAN driver is presentVerify WLAN interface exists by running `ip link show` or `wpa_cli status`Affected if No WLAN interface is found (the vulnerability only applies if WLAN driver is loaded)
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Check if WLAN is enabledAttempt to bring up WLAN interface or check via Settings > Network & Internet > Wi-FiAffected if WLAN is enabled and the device runs Android 11.0 or 12.0
A device is affected if it runs Android version 11.0 or 12.0 and has an active WLAN driver present and enabled, since the out-of-bounds write flaw exists in the WLAN driver on these specific 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.
dbcve · scopedApply the vendor patch ALPS06493873 to update the WLAN driver and remediate the missing bounds check vulnerability.
Latest Android security update (beyond CVE-2022-21752 publication date, typically Jan 2022 or later)
- 1. Check your device's current Android security patch level in Settings > About Phone > Android version security patch level
- 2. Apply the latest Android security update for your device - this will include the MediaTek WLAN driver patch ALPS06493873
- 3. For MediaTek-based devices, ensure your device manufacturer has pushed the firmware update containing the fix
- 4. Verify the patch has been applied by rechecking the security patch level after the update
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-21752 — 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-2022-21752 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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