# CVE-2026-42807

## Summary

- **CVE ID:** CVE-2026-42807
- **Severity:** HIGH
- **CVSS Score:** 8 (CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** CWE-122
- **Published:** Sep 10, 2026
- **Last Modified:** Sep 10, 2026

## Description

A heap-based buffer overflow vulnerability in the PC bridge protocol decoder of BoschSensortec COINES_SDK (versions 2.10 through 2.12.2) allows attackers to cause a denial of service (process crash) or potentially execute arbitrary code. 

The bridge decoder ({{bridge_decoder.c}}) trusts the packet length field provided by the external device and forwards it to the host response queue ({{mqueue_add_data}}) without validating the bounds of the destination buffer. 

A malicious or compromised USB or Bluetooth Low Energy (BLE) peripheral can advertise a payload size up to ~3 KB, which exceeds the default queue slot size of 255 bytes. 

This results in an unbounded heap overwrite ({{memcpy}}), corrupting adjacent heap metadata on the host system when processing the device's response.

## Affected Products

- Bosch Sensortec — COINES_SDK (2.10)

## References

- [CNA](https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._