Uncontrolled Memory Allocation Affecting iperf3 package, versions <3.18-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.67% (50th percentile)

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  • Snyk IDSNYK-ECHOLATEST-IPERF3-18751734
  • published13 Aug 2026
  • disclosed11 Aug 2026

Introduced: 11 Aug 2026

CVE-2026-71218  (opens in a new tab)
CWE-789  (opens in a new tab)

How to fix?

Upgrade Echo:latest iperf3 to version 3.18-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream iperf3 package and not the iperf3 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A flaw was found in iperf3. A remote unauthenticated attacker can exploit a vulnerability in the JSON_read() function, which accepts a peer-controlled message length and allocates memory without an upper bound. This allows the attacker to trigger excessive memory consumption, leading to a Denial of Service (DoS) through memory exhaustion, severe slowdown, or termination of the iperf3 service.

CVSS Base Scores

version 3.1