Linux KernelOperating system · Linux
CVE-2022-20108
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 voice service, there is a possible out of bounds write due to a stack-based buffer overflow. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: DTV03330702; Issue ID: DTV03330702.
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 stack-based buffer overflow vulnerability exists in the voice service component, allowing an attacker with local access to write beyond buffer boundaries. This enables local privilege escalation to System execution level without requiring 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
Linux KernelOperating system
= 4.9= 4.19= 9.0= 10.0= 11.0CVSS 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 the operating system typeRun 'uname -a' or check /etc/os-release for Linux; check 'getprop ro.build.version.release' for AndroidAffected if The OS is neither Linux Kernel nor Android (if different OS, this CVE does not apply)
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Determine the Linux Kernel versionRun 'uname -r' and compare the full version string to 4.9 or 4.19Affected if The installed kernel version is exactly 4.9 or exactly 4.19
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Determine the Android versionRun 'getprop ro.build.version.release' and compare to 9.0, 10.0, or 11.0Affected if The installed Android version is exactly 9.0, 10.0, or 11.0
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Identify if the voice service component is presentSearch for voice service binaries or services (e.g., 'ps -A | grep -i voice' or check for /system/bin/voice* or vendor voice service daemons)Affected if The voice service component is not present on the system (vulnerability only applies when voice service is installed)
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Check if the device runs Android Auto or automotive voice servicesInspect running services and packages for automotive voice components (e.g., 'dumpsys | grep -i voice' or check for com.google.android.car.*voice* packages)Affected if The system uses a voice service that exposes the vulnerable component to local attackers
The system is affected if it runs Linux Kernel 4.9 or 4.19, or Android 9.0/10.0/11.0, AND includes the vulnerable voice service component that can be accessed locally.
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 the vendor patch DTV03330702 to fix the buffer overflow in the voice service. Since exploitation requires local access with System privileges, ensure proper access controls and monitor for unauthorized local access attempts.
Fix this in Linux Kernel
Scoped from the published advisory
- Consultation4.0 h
- Implementation16.0 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 $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-20108 — 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-2022-20108 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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