# RHSA-2026:1967: iperf3 security update

RHSA-2026:1967, released August 3, 2025, fixes 1 CVE in iperf3 (version 3.17.1-4.el10_0.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-1967
- Platform: Linux
- Released: Aug 3, 2025
- Priority: High (Closes CVE-2025-54349, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:1967

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [iperf3](https://patchblox.com/security/data/product/linux/iperf3.md) | RHEL 10 | 3.17.1-4.el10_0.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-54349](https://patchblox.com/security/data/cve/CVE-2025-54349.md) | High | In iperf before 3.19.1, iperf_auth.c has an off-by-one error and resultant heap-based buffer overflow. | 10.0 | 0.0047 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo