# CVE-2023-4233: Memory corruption in Fedora

> A stack-based buffer overflow in the SMS decoder allows remote code execution via malicious SMS messages or base stations.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Apr 2024
- **Updated:** 4 Nov 2025
- **Also known as:** DEBIAN-CVE-2023-4233, GHSA-8863-q6gv-88fw, UBUNTU-CVE-2023-4233

## What is CVE-2023-4233?

CVE-2023-4233 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 17 Apr 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug is triggered within the sms_decode_address_field() function during the SMS PDU decoding. It is assumed that the attack scenario is accessible from a compromised modem, a malicious base station, or just SMS.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2023-4233?

It affects 2 products.


Products: Fedoraproject Fedora, Ofono Project Ofono.

## How do I fix CVE-2023-4233?

Apply the vendor's patch.

## Is CVE-2023-4233 being exploited?

There is no known exploitation of CVE-2023-4233 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-2023-4233 and fix it if it is affected.

What it is: CVE-2023-4233 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 17 Apr 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-2023-4233 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-2023-4233/ (Markdown: https://insights.sbomify.com/CVE-2023-4233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4233
- OSV: https://osv.dev/vulnerability/CVE-2023-4233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4233/
Summaries are generated and may contain mistakes; the official description above is the record.