CVE-2026-71217
Discovered by AISLEPUBLISHEDCWE-20
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.
CVSS Base Scores
CVSS v3.1(Primary)
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.17.1-6.el10_2.1 | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:3.5-12.el8_10.1 | unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:3.9-17.el9_8.1 | unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
Credits
- This issue was discovered by Found by AISLE in partnership with Red Hat.
References
- https://access.redhat.com/errata/RHSA-2026:61257
- https://access.redhat.com/errata/RHSA-2026:61389
- https://access.redhat.com/errata/RHSA-2026:61680
- https://access.redhat.com/security/cve/CVE-2026-71217
- https://bugzilla.redhat.com/show_bug.cgi?id=2460984
- https://github.com/esnet/iperf/commit/494dd377eca4689672becdf06a85158557db1586