High [CVE-2026-71217] iperf3 server accepts unbounded peer-controlled JSON parameters enabling remote denial of service via resource exhaustion
This high-severity Red Hat Linux advisory covers CVE-2026-71217 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8.
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Summary
iperf3 server accepts unbounded peer-controlled JSON parameters enabling remote denial of service via resource exhaustion. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-20.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 1 more.
Affected products named by the advisory: Red Hat package: iperf3.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict network access to the `iperf3` server to trusted clients or networks using firewall rules. If the `iperf3` server functionality is not required, disable the `iperf3` service.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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