CVE-2023-28908
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 · uneditedA specific flaw exists within the Bluetooth stack of the MIB3 infotainment. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow when receiving non-fragmented HCI packets on a channel. The vulnerability was originally discovered in Skoda Superb III car with MIB3 infotainment unit OEM part number 3V0035820. The list of affected MIB3 OEM part numbers is provided in the referenced resources.
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 vulnerability exists in the Bluetooth stack of the MIB3 infotainment system (found in vehicles like Skoda Superb III). The flaw stems from insufficient validation of user-supplied data when processing non-fragmented HCI (Host Controller Interface) packets, which can trigger an integer overflow condition.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
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 infotainment system modelCheck vehicle settings or system info on the infotainment unit to confirm it is the MIB3 system (found in Skoda Superb III and related VW Group vehicles)Affected if The system is not an MIB3 unit, then this specific CVE does not apply
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Determine the firmware version of the MIB3 unitAccess the infotainment system diagnostics or settings menu to retrieve the current firmware/build versionAffected if The firmware version is not at the latest OEM-provided version that addresses this integer overflow in HCI packet processing
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Confirm Bluetooth is enabled on the infotainment systemCheck the infotainment Bluetooth settings or verify Bluetooth is active/pairing-capableAffected if Bluetooth is disabled, the vulnerability in the HCI packet processing code path would not be reachable
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Verify HCI packet processing is activeConfirm the Bluetooth stack is running and able to process incoming HCI packets (non-fragmented packets trigger the flaw)Affected if Bluetooth is active and receiving HCI traffic, the insufficient validation could be exploited
A user is affected if they have a MIB3 infotainment system with an unpatched firmware version and Bluetooth enabled, allowing processing of malicious HCI packets that trigger the integer overflow.
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 dataRemediation requires a firmware update from the vehicle OEM (Skoda/VW Group) that implements proper bounds checking and validation of HCI packet data in the Bluetooth stack to prevent integer overflow.
- Consultation12.0 h
- Implementation4.0 h
- Testing16.0 h
- Review / QA8.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-28908 — 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-2023-28908 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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- 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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