# RHSA-2023:4571: iperf3 security update

RHSA-2023:4571, released August 8, 2023, fixes 1 CVE in iperf3 (version 0:3.9-10.el9_2). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2023-4571
- Platform: Linux
- Released: Aug 8, 2023
- Priority: High (Closes CVE-2023-38403, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2023:4571

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [iperf3](https://patchblox.com/security/data/product/linux/iperf3.md) | RHEL 9 | 0:3.9-10.el9_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-38403](https://patchblox.com/security/data/cve/CVE-2023-38403.md) | High | iperf3: Iperf is a tool which can measure maximum TCP bandwidth and tune various parameters and UDP characteristics | 7.5 | 0.0196 |  |

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Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo