Critical use-after-free in esnet iperf3 3.21 (CVE-2026-101276, CVSS 9.2): remote, unauthenticated attackers can cause DoS or RCE. Upgrade to 3.22+ now. https://radar.offseq.com/threat/cve-2026-101276-cwe-416-use-after-free-in-esnet-iperf3-8a664a87c0e694fb #OffSeq #CVE2026101276 #iperf3