CVE-2020-11114
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 · uneditedu'Bluetooth devices does not properly restrict the L2CAP payload length allowing users in radio range to cause a buffer overflow via a crafted Link Layer packet(Equivalent to CVE-2019-17060,CVE-2019-17061 and CVE-2019-17517 in Sweyntooth paper)' in Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music in AR9344
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 confidenceThis vulnerability exists in the L2CAP (Logical Link Control and Adaptation Protocol) implementation within Qualcomm Snapdragon Bluetooth stacks. The L2CAP payload length is not properly validated, allowing an attacker within radio range to send a crafted Link Layer packet with an oversized payload that overflows a buffer. This is part of the Sweyntooth family of vulnerabilities affecting Bluetooth LE stacks.
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 dataall versionsCVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/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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Identify the Bluetooth chipset or firmware modelCheck the device documentation, system logs, or boot logs for references to Qualcomm Ar9344. On Linux systems, this may appear in dmesg, /var/log/syslog, or by running 'hciconfig -a' or 'btmon' to inspect adapter details.Affected if The device uses Qualcomm Ar9344 firmware for its Bluetooth implementation
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Verify Bluetooth is enabledCheck if the Bluetooth adapter is powered on. On Linux, run 'hciconfig' or 'bluetoothctl show' to see if the adapter state is 'UP' or 'Running'. On other systems, check the OS Bluetooth settings or status indicator.Affected if Bluetooth is actively enabled and the adapter is in an UP or powered-on state
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Confirm the L2CAP layer is accessibleVerify that the Bluetooth stack has L2CAP protocol support loaded and active. This can be checked via Bluetooth management tools or by inspecting active Bluetooth processes and kernel modules (such as bluez utilities).Affected if L2CAP is available and actively used by the Bluetooth stack (which is typical for BLE connections)
If the device runs Qualcomm Ar9344 firmware and has Bluetooth enabled, it is affected by this vulnerability since all firmware versions are impacted.
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 firmware updates from Qualcomm and device manufacturers. If updates are unavailable, consider disabling Bluetooth on affected devices until patches can be deployed.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-11114 — 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-2020-11114 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
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