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A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade iperf3 | Oct 11, 2026 | Aug 31, 2026 |
| Amazon Linux Ami 2 | — | Upgrade iperf3-debuginfoUpgrade iperf3-develUpgrade iperf3 | Oct 19, 2026 | Oct 19, 2026 |
| Amazon_linux_2023 | — | Upgrade iperf3-debuginfoUpgrade iperf3-debugsourceUpgrade iperf3-develUpgrade iperf3 | Sep 1, 2026 | Aug 11, 2026 |
| Oracle_linux | — | Upgrade iperf3 | Oct 22, 2026 | Aug 11, 2026 |
| Redhat_linux | — | Upgrade iperf3Upgrade iperf3-debugsourceNo solution existsUpgrade iperf3-debuginfo | Aug 12, 2026 | Aug 11, 2026 |
| Rocky_linux | — | Upgrade iperf3-debuginfoUpgrade iperf3Upgrade iperf3-debugsource | Sep 2, 2026 | Sep 1, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 21, 2026 | Aug 11, 2026 |
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