CVE-2021-37003
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 · uneditedThere is a Improper Input Validation vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability will cause kernel crash.
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 confidenceThis is an improper input validation vulnerability in the Huawei smartphone kernel. Successful exploitation allows an attacker to trigger a kernel crash through malformed input, resulting in denial of service. The vulnerability has a CVSS base score of 7.5 (HIGH), indicating significant impact on availability.
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= 2.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Verify HarmonyOS versionGo to Settings > About Phone > Version on your Huawei device, or run 'getprop ro.build.version.harmonyos' via ADB shellAffected if The version listed is exactly 2.0
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Check kernel versionRun 'uname -r' or 'cat /proc/version' via ADB shell to retrieve the kernel versionAffected if Kernel version corresponds to HarmonyOS 2.0 build
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Confirm device model is HarmonyOS-capableCheck that the device is a Huawei model that ships with HarmonyOS (not EMUI/Android) by checking Settings > About Phone > ModelAffected if Device runs HarmonyOS firmware rather than EMUI or standard Android
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Identify input validation trigger pointsThe vulnerability is in kernel input validation - any malformed input processed by the kernel could trigger it. There is no specific feature to disable.Affected if Device is running the affected HarmonyOS 2.0 kernel without patches
A user is affected if their Huawei device runs HarmonyOS version 2.0 specifically, as this version contains the vulnerable kernel input validation code.
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 dataUsers should apply Huawei security updates/patches as they become available through the device's system update mechanism. Until a patch is applied, exposure can be minimized by avoiding untrusted applications and network connections.
- Consultation4.0 h
- Testing8.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-37003 — 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-2021-37003 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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