Red HatCVE-2026-71217
Red Hat Enterprise Linux 7: improper input validation
High7.5CVE-2026-71217 · Published Aug 11, 2026 · updated Aug 31, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 7 Product | all versions | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-20
- www.cve.org/CVERecord?id=CVE-2026-71217
- nvd.nist.gov/vuln/detail/CVE-2026-71217
- access.redhat.com/errata/RHSA-2026:61257
- access.redhat.com/errata/RHSA-2026:61389
- access.redhat.com/errata/RHSA-2026:61680
- access.redhat.com/security/cve/CVE-2026-71217
- bugzilla.redhat.com/show_bug.cgi?id=2460984
- github.com/esnet/iperf/commit/494dd377eca4689672becdf06a85158557db1586
More Red Hat advisories
All Red Hat| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 11 | Red Hat FreeIPA: improper authorization | High8.2 | No fix yet |
| Aug 11 | Red Hat search-v2-api. The authentication middleware: authentication bypass | High7.5 | No fix yet |
| Aug 11 | Red Hat acm-search-v2-api-rhel9.: information disclosure | Medium5.3 | No fix yet |
| Aug 11 | Red Hat insights-client.: information disclosure | High7.1 | No fix yet |
| Aug 11 | Red Hat insights-client. A compromised managed cluster: information disclosure | Medium6.8 | No fix yet |
| Aug 11 | Red Hat insights-client: secrets in logs | Medium6.3 | No fix yet |