Iperf3 Security Update — AlmaLinux 9 (ALSA-2026:61389)
This is a security release for AlmaLinux 10, AlmaLinux 9. Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.
Fix Commands
EL8+ (AlmaLinux/CloudLinux/Rocky)
sudo dnf updateWhat this means under a SharedLicense license
iperf3 on AlmaLinux 10, AlmaLinux 9 is the exposure surface; the advisory's own severity data tops out at CVSS 7.5 (CWE-20).
Iperf is a tool which can measure maximum TCP bandwidth and tune various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, and data-gram loss.
Security Fix(es):
* iperf3: iperf3 server accepts unbounded peer-controlled JSON parameters enabling remote denial of service via resource ex…
Type:
security
Severity:
important
Release date:
2026-09-01
Description:
Iperf is a tool which can measure maximum TCP bandwidth and tune various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, and data-gram loss.
Security Fix(es):
* iperf3: iperf3 server accepts unbounded peer-controlled JSON parameters enabling remote denial of service via resource exhaustion (CVE-2026-71217)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References:
Updated packages listed below:
| Architecture | Package | Checksum |
| aarch64 | iperf3-3.9-17.el9_8.1.aarch64.rpm | 1e00b4db02072a7b5f28bf89b5140364cbb913178bc7f6679c483869aea04380 |
| i686 | iperf3-3.9-17.el9_8.1.i686.rpm | c08d9e817740e2a30973c88f863e2a324bd67c24ca57f74169d41c8c8280df16 |
| ppc64le | iperf3-3.9-17.el9_8.1.ppc64le.rpm | e3ad081e235bc40efa889ac446c88c52d8dca165d6dde88a13fa5ed20fd6c8ae |
| s390x | iperf3-3.9-17.el9_8.1.s390x.rpm | 1937f958550581adab8d5718b0a836b4c631afcc04052862a4a9d2f089e9537e |
| x86_64 | iperf3-3.9-17.el9_8.1.x86_64.rpm | 1d0e1ea10a800eab748d3a948b09cb8ce7e2201a4b87240b9edcbeac93b7924f |
Notes:
This page is generated automatically from Red Hat security data and has not been checked for errors. For clarification or corrections please contact the AlmaLinux Packaging Team.
Frequently Asked Questions
What does ALSA-2026:61389 fix?
Which release is covered?
How do I apply it?
References
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