CVE-2021-40058
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 heap-based buffer overflow vulnerability in the video framework. Successful exploitation of this vulnerability may affect availability.
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 vulnerability exists in a video framework component. This memory corruption issue could allow an attacker to overflow heap memory allocations, potentially causing denial of service or potentially remote code execution depending on exploitation context.
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= 10.1.1= 3.1.0= 3.1.1CVSS 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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Identify the device operating systemCheck the device settings or system information to confirm whether the device runs Huawei EMUI or Magic UIAffected if The device is running a version other than EMUI 10.1.0, EMUI 10.1.1, Magic UI 3.1.0, or Magic UI 3.1.1 - those are the ONLY affected versions listed
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Verify the exact EMUI versionNavigate to Settings > About Phone > Version on Huawei devices, or use the command 'getprop ro.build.emui_version' via ADB if availableAffected if The reported version matches exactly 10.1.0 or 10.1.1
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Verify the exact Magic UI versionNavigate to Settings > About Phone > Version on Honor devices running Magic UI, or use the command 'getprop ro.build.magic_ui_version' via ADB if availableAffected if The reported version matches exactly 3.1.0 or 3.1.1
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Confirm the video framework component is presentCheck installed applications or system components related to video processing (such as the video framework, media framework, or video player modules)Affected if The video framework component is present and active on the device - this is the vulnerable component
A device is affected only if it runs exactly EMUI 10.1.0, EMUI 10.1.1, Magic UI 3.1.0, or Magic UI 3.1.1 AND includes the vulnerable video framework component.
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-supplied patches or updates for the affected video framework component. If no patch is available, implement input validation and memory protection measures to mitigate heap corruption risks.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-40058 — 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-2021-40058 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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