CVE-2023-51394
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 · uneditedHigh traffic environments may result in NULL Pointer Dereference vulnerability in Silicon Labs's Ember ZNet SDK before v7.4.0, causing a system 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 · high confidenceNULL Pointer Dereference vulnerability in Silicon Labs Ember ZNet SDK versions before 7.4.0 allows remote attackers to cause system crash via specially crafted high-volume network traffic, resulting in denial of service.
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< 7.4.0CVSS 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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Identify Ember ZNet SDK versionLocate the SDK version in your firmware, device documentation, or software build artifacts. Check firmware metadata, boot logs, or SDK release files embedded in the deployed product.Affected if The reported version is below 7.4.0
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Compare installed version to vulnerable rangeReview version strings or build identifiers from step 1. Compare numerically or against release notes for 7.4.0.Affected if Version is lower than 7.4.0 (e.g., 7.3.x, 7.2.x, etc.)
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Verify network accessibility of affected componentDetermine if the device or firmware using the Ember ZNet stack is exposed to network traffic. Check network configuration, firewall rules, or interface bindings.Affected if The stack handles external network traffic and is reachable from untrusted networks
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Review for crash or denial of service indicatorsExamine system logs, crash dumps, or network monitoring data for unexpected restarts, null pointer exceptions, or service interruptions coinciding with high-volume traffic.Affected if Recent crashes have occurred and correlate with network load patterns
You are affected if your deployed Ember ZNet SDK version is below 7.4.0 and the device processes network traffic.
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.
dbcve · scoped7.4.0
Upgrade Ember ZNet SDK to version 7.4.0 or later to obtain the patch for this vulnerability.
Ember ZNet SDK v7.4.0
- 1. Identify the current version of Ember ZNet SDK in use by checking your project's build configuration or manifest file.
- 2. Download Ember ZNet SDK version 7.4.0 or later from the Silicon Labs website or official repository.
- 3. Update the SDK dependency in your project to reference version 7.4.0 or newer.
- 4. Rebuild and test the application to ensure the NULL Pointer Dereference vulnerability is resolved.
- 5. Verify the system remains stable under high traffic conditions.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing24.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,232.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-51394 — 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-2023-51394 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
- No spam, self-promotion, credentials, or personal data