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CVE-2026-71217 is an improper input validation flaw in the iperf3 server. The server does not adequately bound peer-controlled numeric values in control-channel JSON, including parameters governing parallel streams and buffer length. A crafted request can cause excessive stream and thread creation and large buffer allocations, exhausting host resources and rendering the iperf3 service unavailable.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-accessible, low-complexity vulnerability requiring no privileges or user interaction that affects availability; the supplied CVSS v3 vector indicates no confidentiality or integrity impact and high availability impact.
A network-accessible, low-complexity vulnerability requiring no privileges or user interaction that affects availability only (CVSS v3.0: 7.5). The referenced TencentOS Server 4 package is iperf3.
A network-accessible, low-complexity denial-of-service vulnerability affecting the iperf3 package on Oracle Linux 10; successful exploitation impacts availability only.
A vulnerability in iperf3 for Oracle Linux 8 with a CVSS v3 availability-only impact (C:N/I:N/A:H). Oracle published a patch on September 1, 2026.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.