CVE-2026-71217

HighCVSS 7.5/10Last modified Nov 5, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10	—
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 9	—
Red Hat	Red Hat Enterprise Linux 7	—

References

Timeline

Published: Aug 11, 2026
Last modified: Nov 5, 2026
NVD status: Awaiting Analysis

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