Linux KernelOperating system · Linux
CVE-2022-20106
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 MM service, there is a possible out of bounds write due to a heap-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: DTV03330460; Issue ID: DTV03330460.
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 heap-based buffer overflow in the MM (Multimedia) service allows an attacker to write beyond allocated memory boundaries, enabling local privilege escalation to System execution level 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
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 running kernel versionRun `uname -r` on Linux or check Android system properties via `getprop ro.build.version.release`Affected if The version matches 4.9.x or 4.19.x (Linux Kernel) or 9.0, 10.0, or 11.0 (Android)
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Verify the MM (Multimedia) service is accessibleCheck for MM service processes or services running on the system; on Android this may be visible via `dumpsys` or process listingsAffected if The MM service is actively running or exposed as an IPC endpoint on the device
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Confirm System execution level exposureDetermine if the MM service runs with elevated privileges by reviewing service configuration or process credentialsAffected if The MM service executes with System-level permissions rather than a sandboxed or user-level UID
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Assess local access to the vulnerable serviceVerify whether local applications or processes can communicate with the MM service interfaceAffected if The MM service accepts requests from local untrusted processes without additional authentication or sandboxing
A system is affected if it runs a vulnerable kernel (4.9.x/4.19.x) or Android version (9.0/10.0/11.0) AND has the MM service enabled with System-level privileges accessible to local attackers.
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 vendor patch DTV03330460; until then, restrict access to the MM service and monitor for indicators of exploitation.
Fix this in Linux Kernel
Scoped from the published advisory
- 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-2022-20106 — 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-2022-20106 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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