# CVE-2022-24021: Memory corruption in LinkHub Mesh Wifi

> A buffer overflow in the online_process binary allows attackers to execute arbitrary code by modifying a configuration value.

- **Severity:** Critical 9.6 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/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:** 5 Aug 2022
- **Updated:** 15 Apr 2025
- **Also known as:** GHSA-8v6p-6pr9-m4fx

## What is CVE-2022-24021?

CVE-2022-24021 is a critical memory corruption vulnerability in TCL LinkHub Mesh Wifi, published on 5 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A buffer overflow vulnerability exists in the GetValue functionality of TCL LinkHub Mesh Wi-Fi MS1G_00_01.00_14. A specially-crafted configuration value can lead to a buffer overflow. An attacker can modify a configuration value to trigger this vulnerability.This vulnerability represents all occurances of the buffer overflow vulnerability within the online_process binary.

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

## Which versions are affected by CVE-2022-24021?

It affects 1 product.


Products: Tcl Linkhub Mesh Wifi Ac1200.

## How do I fix CVE-2022-24021?

No fix has been published for CVE-2022-24021 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-24021 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-24021 exists.

## Other vulnerabilities in TCL LinkHub Mesh Wifi

- [CVE-2022-21178](https://insights.sbomify.com/CVE-2022-21178/): Command injection in LinkHub Mesh Wifi (critical 9.6)
- [CVE-2022-22140](https://insights.sbomify.com/CVE-2022-22140/): Command injection in LinkHub Mesh Wifi (critical 9.6)
- [CVE-2022-24005](https://insights.sbomify.com/CVE-2022-24005/): Memory corruption in LinkHub Mesh Wifi (critical 9.6)
- [CVE-2022-24006](https://insights.sbomify.com/CVE-2022-24006/): Memory corruption in LinkHub Mesh Wifi (critical 9.6)
- [CVE-2022-24007](https://insights.sbomify.com/CVE-2022-24007/): Memory corruption in LinkHub Mesh Wifi (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-24021 and fix it if it is affected.

What it is: CVE-2022-24021 is a critical memory corruption vulnerability in TCL LinkHub Mesh Wifi, published on 5 Aug 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-24021 exists.

Affected product: TCL LinkHub Mesh Wifi. 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-2022-24021/ (Markdown: https://insights.sbomify.com/CVE-2022-24021/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-24021
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-24021
- OSV: https://osv.dev/vulnerability/CVE-2022-24021

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-24021/
Summaries are generated and may contain mistakes; the official description above is the record.