# CVE-2023-6387: Incorrect buffer parsing in Bluetooth LE sample code may lead to buffer overflow

> A buffer overflow in the Bluetooth LE HCI CPC sample application allows attackers to cause denial of service or execute arbitrary code.

- **Severity:** High 7.5 (`CVSS:3.1/AV:A/AC:H/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:** 2 Feb 2024
- **Updated:** 15 May 2025
- **Also known as:** GHSA-48gx-pf5r-9pp3

## What is CVE-2023-6387?

CVE-2023-6387 is a high-severity memory corruption vulnerability in silabs.com GSDK, published on 2 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A potential buffer overflow exists in the Bluetooth LE HCI CPC sample application in the Gecko SDK which may result in a denial of service or remote code execution

Weakness: CWE-131 (Incorrect Calculation of Buffer Size), CWE-787 (Out-of-bounds Write), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-6387?

It affects 1 product.


Products: Silabs Gecko Software Development Kit.

## How do I fix CVE-2023-6387?

No fix has been published for CVE-2023-6387 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6387 being exploited?

There is no known exploitation of CVE-2023-6387 in the wild and no public exploit code.

Public exploit code:

- Repository for testing exploiting CVE-2023-6387 using TypeScript and JavaScript. (github_poc): https://github.com/A3ST1CODE/CVE_6387

## Other vulnerabilities in silabs.com GSDK

- [CVE-2023-45318](https://insights.sbomify.com/CVE-2023-45318/): Memory corruption in Gecko Platform (critical 10.0)
- [CVE-2023-2686](https://insights.sbomify.com/CVE-2023-2686/): Memory corruption in Gecko Platform (critical 9.8)
- [CVE-2023-4280](https://insights.sbomify.com/CVE-2023-4280/): Unvalidated input in Silicon Labs TrustZone implementation leads to accessing Trusted memory region (critical 9.3)
- [CVE-2023-4020](https://insights.sbomify.com/CVE-2023-4020/): Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory (critical 9.0)
- [CVE-2023-25181](https://insights.sbomify.com/CVE-2023-25181/): Memory corruption in Cesium NET (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6387 and fix it if it is affected.

What it is: CVE-2023-6387 is a high-severity memory corruption vulnerability in silabs.com GSDK, published on 2 Feb 2024. 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-2023-6387 in the wild and no public exploit code.

Affected product: silabs.com GSDK. 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-2023-6387/ (Markdown: https://insights.sbomify.com/CVE-2023-6387/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6387
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6387
- OSV: https://osv.dev/vulnerability/CVE-2023-6387

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6387/
Summaries are generated and may contain mistakes; the official description above is the record.