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DEBIAN-CVE-2026-71218

Type: advisorySource: OSV1 source record

A flaw was found in iperf3. A remote unauthenticated attacker can exploit a vulnerability in the `JSON_read()` function, which accepts a peer-controlled message length and allocates memory without an upper bound. This allows the attacker to trigger excessive memory consumption, leading to a Denial of Service (DoS) through memory exhaustion, severe slowdown, or termination of the iperf3 service.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-71218

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-2026-71218

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

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

iperf3

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
3.18-1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

iperf3

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
3.18-1

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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71218.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.18-1"
          }
        ]
      }
    ],
    "package": {
      "name": "iperf3",
      "purl": "pkg:deb/debian/iperf3?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71218.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.18-1"
          }
        ]
      }
    ],
    "package": {
      "name": "iperf3",
      "purl": "pkg:deb/debian/iperf3?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71218.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58165 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement