# CVE-2026-42807: Memory corruption in COINES SDK

> Heap buffer overflow in Bosch COINES SDK allows malicious peripherals to cause crashes or execute arbitrary code via oversized packets.

- **Severity:** High 8.0 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-m73h-r7p8-3rvm

## What is CVE-2026-42807?

CVE-2026-42807 is a high-severity memory corruption vulnerability in Bosch Sensortec COINES_SDK, published on 10 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2026-42807?


## How do I fix CVE-2026-42807?

No fix has been published for CVE-2026-42807 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42807 being exploited?

There is no known exploitation of CVE-2026-42807 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42807 and fix it if it is affected.

What it is: CVE-2026-42807 is a high-severity memory corruption vulnerability in Bosch Sensortec COINES_SDK, published on 10 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-42807 in the wild and no public exploit code.

Affected product: Bosch Sensortec COINES_SDK. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-42807/ (Markdown: https://insights.sbomify.com/CVE-2026-42807/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42807
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42807
- OSV: https://osv.dev/vulnerability/CVE-2026-42807

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42807/
Summaries are generated and may contain mistakes; the official description above is the record.