Source: iperf3 Version: 3.20-2.1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for iperf3. CVE-2026-71217[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-71217 https://www.cve.org/CVERecord?id=CVE-2026-71217 [1] https://github.com/esnet/iperf/commit/494dd377eca4689672becdf06a85158557db1586 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
