# CVE-2024-0229: Xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access

> Out-of-bounds memory access in X.Org server allows local privilege escalation or remote code execution via SSH X11 forwarding.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Feb 2024
- **Updated:** 6 Nov 2025
- **Also known as:** AZL-34214, AZL-44880, BELL-CVE-2024-0229, DEBIAN-CVE-2024-0229, GHSA-49wx-9h9f-8c9g, UBUNTU-CVE-2024-0229

## What is CVE-2024-0229?

CVE-2024-0229 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 9 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a device frozen by a sync grab is reattached to a different master device. This issue may lead to an application crash, local privilege escalation (if the server runs with extended privileges), or remote code execution in SSH X11 forwarding environments.

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

## Which versions are affected by CVE-2024-0229?

It affects 8 products.


Products: Fedoraproject Fedora, Redhat Enterprise Linux, Redhat Enterprise Linux Aus, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Tus, Redhat Enterprise Linux Update Services for Sap Solutions, X.org X Server, X.org Xwayland.

## How do I fix CVE-2024-0229?

Apply the vendor's patch.

## Is CVE-2024-0229 being exploited?

There is no known exploitation of CVE-2024-0229 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-0229 and fix it if it is affected.

What it is: CVE-2024-0229 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 9 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-2024-0229 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2024-0229/ (Markdown: https://insights.sbomify.com/CVE-2024-0229/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-0229
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0229
- OSV: https://osv.dev/vulnerability/CVE-2024-0229

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-0229/
Summaries are generated and may contain mistakes; the official description above is the record.