CVE-2022-21783
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: ALPS06704526; Issue ID: ALPS06704482.
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 missing bounds check in the WLAN driver allows an out-of-bounds write vulnerability, enabling local privilege escalation to System level without user interaction. The vulnerability stems from insufficient input validation in memory operations within the wireless network driver code.
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 versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The displayed version is exactly 11.0 or 12.0 (not 10, 13, or other versions)
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Confirm WLAN hardware is presentCheck device has wireless capability via Settings > Network & Internet > Wi-Fi, or run 'wpa_supplicant' statusAffected if WLAN hardware is detected and available on the device
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Check WLAN driver statusRun 'ip link show' or 'iw list' via ADB shell to confirm wireless interface exists (typically wlan0)Affected if A wireless interface (wlan0) is present and active
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Verify patch levelRun 'getprop ro.build.version.security_patch' via ADB shell to check security patch dateAffected if The security patch level is earlier than the vendor fix date (ALPS06704526)
The device is affected if it runs Android 11.0 or 12.0 with an active WLAN interface and has not received the vendor security patch for the WLAN driver vulnerability.
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 (ALPS06704526) to the affected WLAN driver. Verify WLAN functionality post-patch and conduct privilege escalation testing to confirm the vulnerability is resolved.
- Contact MediaTek or your device manufacturer to obtain Patch ID ALPS06704526 for the WLAN driver update
- Apply the MediaTek ALPS06704526 patch to the affected device's WLAN driver
- Alternatively, ensure the device receives the Android Security Bulletin patch for March 2022 or later, which incorporates this MediaTek WLAN driver fix
- After patching, verify the WLAN driver version includes the fix by checking system updates or contacting the device vendor
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation6.0 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 $6,080.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-21783 — 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-2022-21783 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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