A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.
Metrics
Affected Vendors & Products
References
History
Tue, 11 Aug 2026 17:30:00 +0000
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ssvc
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Tue, 11 Aug 2026 15:45:00 +0000
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| First Time appeared |
Iperf3 Project
Iperf3 Project iperf3 |
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| Vendors & Products |
Iperf3 Project
Iperf3 Project iperf3 |
Tue, 11 Aug 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Tue, 11 Aug 2026 10:30:00 +0000
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Tue, 11 Aug 2026 09:15:00 +0000
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| Description | A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server. | |
| Title | Iperf3: iperf3 server accepts unbounded peer-controlled json parameters enabling remote denial of service via resource exhaustion | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
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| Weaknesses | CWE-20 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published: 2026-08-11T08:50:10.140Z
Updated: 2026-08-11T16:11:15.858Z
Reserved: 2026-08-05T08:41:54.899Z
Link: CVE-2026-71217
Updated: 2026-08-11T16:11:09.490Z
Status : Received
Published: 2026-08-11T09:17:14.057
Modified: 2026-08-11T17:19:12.937
Link: CVE-2026-71217