Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-71217
Red Hat Red Hat Enterprise Linux 10 — Iperf3: iperf3 server accepts unbounded peer-controlled json parameters enabling remote denial of service via resource exhaustion
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N N H 7.5 .0082 55.9 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 10 unspecified 0:3.17.1-6.el10_2.1
Red Hat Enterprise Linux 8 unspecified 0:3.5-12.el8_10.1
Red Hat Enterprise Linux 9 unspecified 0:3.9-17.el9_8.1
Red Hat Enterprise Linux 7 unspecified —
TIMELINE
Aug 5 Reserved by redhat
Aug 11 Published (CNA: redhat)
Aug 30 PATCH SHIPPED — CVE-2026-71217 (Red Hat Enterprise Linux 8). Fixed in Red Hat Enterprise Linux 8 0:3.5-12.el8_10.1.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 5, 2026 | Reserved | Reserved by redhat |
| August 11, 2026 | Published | Published (CNA: redhat) |
| August 30, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-71217 (Red Hat Enterprise Linux 8). Fixed in Red Hat Enterprise Linux 8 0:3.5-12.el8_10.1. |
Affected
Affected products and packages — 4 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — | 0:3.17.1-6.el10_2.1 |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 0:3.5-12.el8_10.1 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | 0:3.9-17.el9_8.1 |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-71217 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
