Uncontrolled Memory Allocation Affecting iperf package, versions <3.22-150000.3.18.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.67% (50th percentile)

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  • Snyk IDSNYK-SLES157-IPERF-21000685
  • published16 Oct 2026
  • disclosed15 Oct 2026

Introduced: 15 Oct 2026

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