# CVE-2024-6442: Bluetooth: ASCS Unchecked tailroom of the response buffer

> An unchecked tailroom in the Bluetooth ASCS module allows a global buffer overflow, potentially leading to code execution or denial of service.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **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:** 4 Oct 2024
- **Updated:** 4 Oct 2024
- **Also known as:** GHSA-m22j-ccg7-4v4h, UBUNTU-CVE-2024-6442

## What is CVE-2024-6442?

CVE-2024-6442 is a medium-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 4 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In ascs_cp_rsp_add in /subsys/bluetooth/audio/ascs.c, an unchecked tailroom could lead to a global buffer overflow.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2024-6442?

It affects 1 product.


Products: Zephyrproject Zephyr.

## How do I fix CVE-2024-6442?

No fix has been published for CVE-2024-6442 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-6442 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-6442 exists.

## Other vulnerabilities in Zephyrproject Zephyr

- [CVE-2026-5067](https://insights.sbomify.com/CVE-2026-5067/): Out-of-bounds read/write in HTTP WebSocket upgrade via non-null-terminated Sec-WebSocket-Key (critical 9.8)
- [CVE-2022-3806](https://insights.sbomify.com/CVE-2022-3806/): Bluetooth HCI Error Handling Double Free (critical 9.8)
- [CVE-2017-14199](https://insights.sbomify.com/CVE-2017-14199/): Memory corruption in getaddrinfo (critical 9.8)
- [CVE-2018-1000800](https://insights.sbomify.com/CVE-2018-1000800/): Null dereference in n/a (critical 9.8)
- [CVE-2021-3329](https://insights.sbomify.com/CVE-2021-3329/): DOS: Incorrect handling of the initial HCI ACL_MTU handshake packet leads to crash of bluetooth host layer (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-6442 and fix it if it is affected.

What it is: CVE-2024-6442 is a medium-severity memory corruption vulnerability in Zephyrproject Zephyr, published on 4 Oct 2024. 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-2024-6442 exists.

Affected product: Zephyrproject Zephyr. 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-2024-6442/ (Markdown: https://insights.sbomify.com/CVE-2024-6442/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-6442
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-6442
- OSV: https://osv.dev/vulnerability/CVE-2024-6442

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-6442/
Summaries are generated and may contain mistakes; the official description above is the record.