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DEBIAN-CVE-2026-71217

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-71217

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-71217

iperf3

Source reference: /affected/0/package/name

Affected versions
3.12-1

Source reference: /affected/0/versions

3.12-1+deb12u1

Source reference: /affected/0/versions

3.12-1+deb12u2

Source reference: /affected/0/versions

3.13-1

Source reference: /affected/0/versions

3.13-2

Source reference: /affected/0/versions

3.14-1

Source reference: /affected/0/versions

3.15-1

Source reference: /affected/0/versions

3.16-1

Source reference: /affected/0/versions

3.17.1-1

Source reference: /affected/0/versions

3.18-1

Source reference: /affected/0/versions

3.18-2

Source reference: /affected/0/versions

3.19.1-1

Source reference: /affected/0/versions

3.19.1-2

Source reference: /affected/0/versions

3.20-1

Source reference: /affected/0/versions

3.20-2

Source reference: /affected/0/versions

3.20-2.1

Source reference: /affected/0/versions

3.22-0.1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

iperf3

Source reference: /affected/1/package/name

Affected versions
3.18-2

Source reference: /affected/1/versions

3.18-2+deb13u1

Source reference: /affected/1/versions

3.18-2+deb13u2

Source reference: /affected/1/versions

3.19.1-1

Source reference: /affected/1/versions

3.19.1-2

Source reference: /affected/1/versions

3.20-1

Source reference: /affected/1/versions

3.20-2

Source reference: /affected/1/versions

3.20-2.1

Source reference: /affected/1/versions

3.22-0.1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

iperf3

Source reference: /affected/2/package/name

Affected versions
3.18-2

Source reference: /affected/2/versions

3.19.1-1

Source reference: /affected/2/versions

3.19.1-2

Source reference: /affected/2/versions

3.20-1

Source reference: /affected/2/versions

3.20-2

Source reference: /affected/2/versions

3.20-2.1

Source reference: /affected/2/versions

Fixed versions
3.22-0.1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "iperf3",
      "purl": "pkg:deb/debian/iperf3?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.12-1",
      "3.12-1+deb12u1",
      "3.12-1+deb12u2",
      "3.13-1",
      "3.13-2",
      "3.14-1",
      "3.15-1",
      "3.16-1",
      "3.17.1-1",
      "3.18-1",
      "3.18-2",
      "3.19.1-1",
      "3.19.1-2",
      "3.20-1",
      "3.20-2",
      "3.20-2.1",
      "3.22-0.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71217.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "iperf3",
      "purl": "pkg:deb/debian/iperf3?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.18-2",
      "3.18-2+deb13u1",
      "3.18-2+deb13u2",
      "3.19.1-1",
      "3.19.1-2",
      "3.20-1",
      "3.20-2",
      "3.20-2.1",
      "3.22-0.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71217.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.22-0.1"
          }
        ]
      }
    ],
    "package": {
      "name": "iperf3",
      "purl": "pkg:deb/debian/iperf3?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.18-2",
      "3.19.1-1",
      "3.19.1-2",
      "3.20-1",
      "3.20-2",
      "3.20-2.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71217.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]
Related CVEs
CVE-2026-71217

Source reference: /upstream

Publisher severity

high

Source reference: /severity/0/score

Event
#83870 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement