# CVE-2023-39541: Denial of service in Gecko Platform

> A remote attacker can cause a denial of service in Weston Embedded uC-TCP-IP by sending a specially crafted ICMPv6 packet that triggers an out-of-bounds read.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Feb 2024
- **Updated:** 4 Nov 2025
- **Also known as:** GHSA-4mgv-g5j9-fr8q

## What is CVE-2023-39541?

CVE-2023-39541 is a medium-severity denial of service vulnerability in Silicon Labs Gecko Platform, published on 20 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A denial of service vulnerability exists in the ICMP and ICMPv6 parsing functionality of Weston Embedded uC-TCP-IP v3.06.01. A specially crafted network packet can lead to an out-of-bounds read. An attacker can send a malicious packet to trigger this vulnerability.This vulnerability concerns a denial of service within the parsing an IPv6 ICMPv6 packet.

Weakness: CWE-125 (Out-of-bounds Read), CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2023-39541?

It affects 1 product.


Products: Weston-Embedded Uc-Tcp-Ip.

## How do I fix CVE-2023-39541?

No fix has been published for CVE-2023-39541 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-39541 being exploited?

There is no known exploitation of CVE-2023-39541 in the wild and no public exploit code.

## Other vulnerabilities in Silicon Labs Gecko Platform

- [CVE-2023-38562](https://insights.sbomify.com/CVE-2023-38562/): Use after free in uC-TCP-IP (high 8.7)
- [CVE-2023-39540](https://insights.sbomify.com/CVE-2023-39540/): Denial of service in Gecko Platform (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39541 and fix it if it is affected.

What it is: CVE-2023-39541 is a medium-severity denial of service vulnerability in Silicon Labs Gecko Platform, published on 20 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-39541 in the wild and no public exploit code.

Affected product: Silicon Labs Gecko Platform. 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-2023-39541/ (Markdown: https://insights.sbomify.com/CVE-2023-39541/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39541
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39541
- OSV: https://osv.dev/vulnerability/CVE-2023-39541

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39541/
Summaries are generated and may contain mistakes; the official description above is the record.