# CVE-2023-7250: Iperf3: possible denial of service

> A malicious client can cause the iperf server to hang indefinitely by sending incomplete data, resulting in a denial of service.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Mar 2024
- **Updated:** 6 Nov 2025
- **Also known as:** AZL-36892, CLSA-2025-1755006018, DEBIAN-CVE-2023-7250, GHSA-g636-8hgg-7gx9, JLSEC-2026-760, OESA-2024-1418, UBUNTU-CVE-2023-7250

## What is CVE-2023-7250?

CVE-2023-7250 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 18 Mar 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 iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or malfunctioning client can send less than the expected amount of data to the iperf server, which can cause the server to hang indefinitely waiting for the remainder or until the connection gets closed. This will prevent other connections to the server, leading to a denial of service.

Weakness: CWE-183 (Permissive List of Allowed Inputs)

## Which versions are affected by CVE-2023-7250?

It affects 5 products.


Products: Es Iperf3, Redhat Enterprise Linux, Redhat Enterprise Linux for Arm 64, Redhat Enterprise Linux for Ibm Z Systems, Redhat Enterprise Linux for Power Little Endian.

## How do I fix CVE-2023-7250?

Apply the vendor's patch.

## Is CVE-2023-7250 being exploited?

There is no known exploitation of CVE-2023-7250 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2025-54351](https://insights.sbomify.com/CVE-2025-54351/): Memory corruption in iperf3 (high 8.9)
- [CVE-2024-53580](https://insights.sbomify.com/CVE-2024-53580/): Null dereference in n/a (high 7.5)
- [CVE-2025-54349](https://insights.sbomify.com/CVE-2025-54349/): Memory corruption in iperf3 (medium 6.5)
- [CVE-2024-26306](https://insights.sbomify.com/CVE-2024-26306/): Information disclosure in n/a (medium 5.9)
- [CVE-2025-54350](https://insights.sbomify.com/CVE-2025-54350/): Denial of service in iperf3 (low 3.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-7250 and fix it if it is affected.

What it is: CVE-2023-7250 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 18 Mar 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-2023-7250 in the wild and no public exploit code.

Affected product: Redhat Enterprise Linux. 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-2023-7250/ (Markdown: https://insights.sbomify.com/CVE-2023-7250/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-7250
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-7250
- OSV: https://osv.dev/vulnerability/CVE-2023-7250

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-7250/
Summaries are generated and may contain mistakes; the official description above is the record.