# CVE-2023-2683: Connection update while closing connection may lead to denial-of-service

> An attacker can cause a denial of service in the EFR32 Bluetooth LE stack by sending invalid pairing messages, preventing legitimate connections.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/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:** 15 Jun 2023
- **Updated:** 11 Dec 2024
- **Also known as:** GHSA-xgxr-3384-47xm

## What is CVE-2023-2683?

CVE-2023-2683 is a medium-severity denial of service vulnerability in silabs.com Bluetooth SDK, published on 15 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A memory leak in the EFR32 Bluetooth LE stack 5.1.0 through 5.1.1 allows an attacker to send an invalid pairing message and cause future legitimate connection attempts to fail. A reset of the device immediately clears the error.

Weakness: CWE-400 (Uncontrolled Resource Consumption), CWE-401 (Missing Release of Memory after Effective Lifetime)

## Which versions are affected by CVE-2023-2683?

It affects 1 product.


Products: Silabs Bluetooth Low Energy Software Development Kit.

## How do I fix CVE-2023-2683?

No fix has been published for CVE-2023-2683 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-2683 being exploited?

There is no known exploitation of CVE-2023-2683 in the wild and no public exploit code.

## Other vulnerabilities in silabs.com Bluetooth SDK

- [CVE-2020-15531](https://insights.sbomify.com/CVE-2020-15531/): Memory corruption in n/a (high 8.8)
- [CVE-2020-15532](https://insights.sbomify.com/CVE-2020-15532/): Memory corruption in n/a (medium 6.5)
- [CVE-2023-41093](https://insights.sbomify.com/CVE-2023-41093/): Loss of confidentiality due to potential race condition in Bluetooth controller Connection_Handle reuse (low 3.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-2683 and fix it if it is affected.

What it is: CVE-2023-2683 is a medium-severity denial of service vulnerability in silabs.com Bluetooth SDK, published on 15 Jun 2023. 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-2023-2683 in the wild and no public exploit code.

Affected product: silabs.com Bluetooth 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-2023-2683/ (Markdown: https://insights.sbomify.com/CVE-2023-2683/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2683
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2683
- OSV: https://osv.dev/vulnerability/CVE-2023-2683

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2683/
Summaries are generated and may contain mistakes; the official description above is the record.