What’s Vulnerable › Vulnerabilities

CVE-2023-7250: Iperf3: possible denial of service

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-18 · updated 2026-06-17
• Weakness: CWE-183

Description

A flaw was found in iperf, a utility for testing network performance using TCP, UDP, and SCTP. A malicious or malfunctioning client can send less than the expected amount of data to the iperf server, which can cause the server to hang indefinitely waiting for the remainder or until the connection gets closed. This will prevent other connections to the server, leading to a denial of service.

Affected products

• ES iperf3: before 3.15 — fixed in 3.15
• Red Hat Enterprise Linux: 8.0, 9.0
• RedHat Enterprise Linux For Arm 64: 8.0_aarch64, 9.0_aarch64
• RedHat Enterprise Linux For Ibm Z Systems: 8.0_s390x, 9.0_s390x
• RedHat Enterprise Linux For Power Little Endian: 8.0_ppc64le

How to fix

Upgrade to a fixed version: ES iperf3 3.15. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2024:4241
• https://access.redhat.com/errata/RHSA-2024:9185
• https://access.redhat.com/security/cve/CVE-2023-7250
• https://bugzilla.redhat.com/show_bug.cgi?id=2244707
• https://access.redhat.com/errata/RHSA-2024:4241
• https://access.redhat.com/security/cve/CVE-2023-7250
• https://bugzilla.redhat.com/show_bug.cgi?id=2244707
• https://lists.debian.org/debian-lts-announce/2025/01/msg00027.html

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