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DEBIAN-CVE-2026-102253

Type: advisorySource: OSV1 source record

iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-102253

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-2026-102253

iperf3

Source reference: /affected/0/package/name

Affected versions
3.18-2

Source reference: /affected/0/versions

3.18-2+deb13u1

Source reference: /affected/0/versions

3.18-2+deb13u2

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

3.19.1-1

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

Fixed versions
3.22-0.1

Source reference: /affected/1/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=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-2026-102253.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-2026-102253.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]
Related CVEs
CVE-2026-102253

Source reference: /upstream

Publisher severity

high

Source reference: /severity/0/score

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-102253 · High

iperf3

Event
#83869 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement