Hi,

The following vulnerability was published for iperf3.

CVE-2026-71217[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-71217
https://www.cve.org/CVERecord?id=CVE-2026-71217
[1] https://github.com/esnet/iperf/commit/494dd377eca4689672becdf06a85158557db1586

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore