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OpenharmonyOperating system · Openatom

CVE-2025-27536

MEDIUM · 5.5 CVSS v3.1 Published 2025-08-11
Fix available
A fix is available. Upgrade to after 5.0.3 or later.
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
in OpenHarmony v5.0.3 and prior versions allow a local attacker cause DOS through type confusion.

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

This is a type confusion vulnerability in OpenHarmony v5.0.3 and prior versions that allows a local attacker to cause a denial of service. Type confusion occurs when code uses an object without properly verifying its type, leading to unexpected behavior that can crash the system.

MitigationApply the vendor patch for OpenHarmony v5.0.3 when available. Until then, limit local access to trusted users only to reduce the attack surface.

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
OpenharmonyOperating system
Affected:<= 5.0.3

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 OpenHarmony version
    Run 'param get' or check /system/etc/param/ohos.version file to retrieve the installed OpenHarmony version number
    Affected if The installed version is 5.0.3 or any version prior to 5.0.3
  2. Verify the vulnerable component is present
    Check for the Ark runtime or JavaScript engine components by examining /system/lib/ or /system/bin/ directories for files related to type handling or object serialization
    Affected if The component handling type confusion operations exists in the installation
  3. Confirm the service is running
    Use 'hisysevent' or 'hdc shell' to list running services and identify if the component vulnerable to type confusion is active
    Affected if The vulnerable service or daemon linked to type handling is actively running on the system
  4. Check system access level
    Review user access controls and local user permissions using 'ls -la' on critical system directories
    Affected if Untrusted local users have access to the system where the vulnerable component runs

A system is affected if it runs OpenHarmony version 5.0.3 or earlier and has the component vulnerable to type confusion actively in use.

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
Upgrade available Upgrade to a release after 5.0.3
Interim mitigation

Apply the vendor patch for OpenHarmony v5.0.3 when available. Until then, limit local access to trusted users only to reduce the attack surface.

Fix this in Openharmony Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,380
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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-2025-27536 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