dbcve.org
HarmonyosOperating system · Huawei

CVE-2021-22471

MEDIUM · 5.5 CVSS v3.1 Published 2021-10-28
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
57/100
Remediation priority · Elevated
Zero-click

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 · unedited
A component of the HarmonyOS has a NULL Pointer Dereference vulnerability. Local attackers may exploit this vulnerability to cause nearby process 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 confidence

A NULL pointer dereference vulnerability exists in a component of Huawei's HarmonyOS operating system. Local attackers can exploit this vulnerability to cause a denial of service by crashing nearby processes.

MitigationApply the vendor-supplied HarmonyOS security patch when available. Until then, monitor system logs for crashes that may indicate exploitation attempts.

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
HarmonyosOperating system
Affected:= 2.0

CVSS 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify HarmonyOS version
    Check the device's HarmonyOS version through system settings (Settings > About Phone > Version) or using command-line tools such as 'getprop' or 'hdc shell bm get -v
    Affected if The installed HarmonyOS version is exactly 2.0
  2. Review system crash logs
    Examine system logs (logcat, crash dumps, or bugreport files) for NULL pointer dereference errors occurring in the vulnerable component timeframe
    Affected if Unexpected process crashes with NULL pointer errors appear in logs without other explainable cause
  3. Check patch status
    Contact Huawei support or check HarmonyOS security bulletins to determine if the CVE-2021-22471 patch has been applied to your environment
    Affected if The security update addressing this vulnerability has not been installed

A system is affected if it runs HarmonyOS 2.0 and lacks the vendor-supplied security patch for this NULL pointer dereference vulnerability

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor-supplied HarmonyOS security patch when available. Until then, monitor system logs for crashes that may indicate exploitation attempts.

Fix this in Harmonyos Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing3.0 h
  • Review / QA2.0 h
10.0 hours of engineering $1,770
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-22471 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data