Improper Input Validation Affecting iperf package, versions <3.22-150000.3.18.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.64% (50th percentile)

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  • Snyk IDSNYK-SLES157-IPERF-21000671
  • published16 Oct 2026
  • disclosed15 Oct 2026

Introduced: 15 Oct 2026

NewCVE-2026-71217  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 iperf to version 3.22-150000.3.18.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream iperf package and not the iperf package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1