# CVE-2026-42808: Memory corruption in COINES SDK

> A buffer overflow in the Bosch COINES SDK allows malicious hardware to cause denial of service or execute arbitrary code on the host system.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-p6fr-934x-xrhw

## What is CVE-2026-42808?

CVE-2026-42808 is a medium-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, with no action from the victim.

### Official description

An issue was discovered in Bosch Sensortec COINES_SDK versions 2.0 through 2.11. 

The host streaming API function {{coines_read_stream_sensor_data()}} fails to validate the boundaries of the caller-provided destination buffer.

Internally, the stream processing mechanism in {{comm_intf_process_stream_response()}} discards the requested {{number_of_samples}} argument and copies the entirety of the streaming ring buffer's accumulated data into {{coines_stream_rsp_buf}}.

Subsequently, {{coines_read_stream_sensor_data()}} unconditionally executes a {{memcpy}} of the ring buffer size into the caller-provided buffer without verifying if the destination memory allocation is large enough.

A malicious or compromised hardware board connected via USB or BLE can exploit this by streaming a high volume of sensor samples, causing a heap or stack-based buffer overflow on the host desktop environment.

This can result in a Denial of Service (DoS) or potential arbitrary code execution on the host machine.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-42808?


## How do I fix CVE-2026-42808?

No fix has been published for CVE-2026-42808 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42808 being exploited?

There is no known exploitation of CVE-2026-42808 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42808 and fix it if it is affected.

What it is: CVE-2026-42808 is a medium-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, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-42808 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-2026-42808/ (Markdown: https://insights.sbomify.com/CVE-2026-42808/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42808
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42808
- OSV: https://osv.dev/vulnerability/CVE-2026-42808

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-42808/
Summaries are generated and may contain mistakes; the official description above is the record.