{
  "cveId": "CVE-2026-101276",
  "url": "https://patchblox.com/security/cve/CVE-2026-101276",
  "summary": "CVE-2026-101276 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-101276, released October 5, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s per-test watchdog server_timer_proc() frees streams without cancelling/joining their worker threads, so a blocked worker dereferences a freed iperf_stream; fixed in 3.22.",
  "description": "iperf3 3.21 (esnet/iperf) contains a remote, unauthenticated heap use-after-free: the server\u0027s per-test watchdog server_timer_proc() frees streams without cancelling/joining their worker threads, so a blocked worker dereferences a freed iperf_stream; fixed in 3.22.",
  "published": "2026-09-30T21:16:54Z",
  "severity": "Critical",
  "cwe": "Use After Free",
  "epss": 0.00396,
  "epssPercentile": 0.34026,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-101276",
  "fixes": [
    {
      "platform": "linux",
      "product": "iperf",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.21-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22090-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22090-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "iperf",
      "release": "sles 15.7",
      "fixedVersion": "3.22-150000.3.18.1",
      "fix": "SUSE-SU-2026:4678-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4678-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "iperf",
      "release": "sles 16.0",
      "fixedVersion": "3.21-160000.1.1",
      "fix": "SUSE-SU-2026:24234-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24234-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "iperf3",
      "release": "Debian 14",
      "fixedVersion": "3.22-0.1",
      "fix": "DEBIAN-CVE-2026-101276",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-101276",
      "released": "2026-10-05T21:42:17Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}