CVE-2020-9129
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 · uneditedHUAWEI Mate 30 versions earlier than 10.1.0.159(C00E159R7P2) have a vulnerability of improper buffer operation. Due to improper restrictions, local attackers with high privileges can exploit the vulnerability to cause system heap overflow.
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 a heap overflow vulnerability in Huawei Mate 30 smartphones caused by improper buffer operations in the system software. The vulnerability requires the attacker to have high local privileges to exploit, suggesting the vulnerable code handles privileged operations without proper bounds checking.
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< 10.1.0.159\(c00e159r7p2\)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
- 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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Confirm device model is Huawei Mate 30Navigate to Settings > About Phone > Model Number, or check the physical device label, or use ADB command: getprop ro.product.modelAffected if Device model is not Huawei Mate 30, this CVE does not apply
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Determine the installed firmware versionNavigate to Settings > About Phone > Version > Build Number, or use ADB command: getprop ro.build.version.emuiAffected if Unable to retrieve firmware version from the device
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Compare firmware version against the affected rangeCheck if the firmware version is < 10.1.0.159(c00e159r7p2). Note that version strings may appear in formats like 10.1.0.159(C00E159R7P2) or 10.1.0.159C00E159R7P2 - compare numerically where possibleAffected if Firmware version is lower than 10.1.0.159(c00e159r7p2)
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Verify the device has system software with buffer handling functionalityConfirm the device runs Huawei's EMUI system software (default for Mate 30). The vulnerability exists in system software buffer operations, which are present in standard Mate 30 firmwareAffected if Device runs non-standard or heavily modified firmware where system buffer operation components have been removed
A user is affected if they are running a Huawei Mate 30 device with firmware version lower than 10.1.0.159(c00e159r7p2) and the standard EMUI system software is present.
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 data10.1.0.159
Update Huawei Mate 30 to version 10.1.0.159(C00E159R7P2) or later to receive the patched firmware that properly restricts buffer operations.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9129 — 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-2020-9129 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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