Vulnerability-Lookup

UBUNTU-CVE-2026-101283 (CVE-2026-101283)

Vulnerability from osv_ubuntu – Published: 2026-10-02 00:00 – Updated: 2026-10-02 00:00 – Source website

Details

iperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22

Severity

9.2 (Critical)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

9.2 (Critical)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-101283	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-101283	REPORT
	https://github.com/esnet/iperf/releases/tag/3.22	REPORT
	https://github.com/esnet/iperf/commit/e29f6504dcf…	REPORT
	https://newreleases.io/project/github/esnet/iperf…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.0.11-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.0.11-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.0.11-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.11-1",
        "3.0.11-1ubuntu0.1~esm1",
        "3.0.11-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.1.3-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.1.3-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.1.3-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.3-1",
        "3.1.3-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.7-3ubuntu0.1~esm2"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.7-3ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.7-3ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6-2",
        "3.7-1",
        "3.7-2",
        "3.7-3",
        "3.7-3ubuntu0.1~esm1",
        "3.7-3ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.9-1+deb11u1ubuntu0.1"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.9-1+deb11u1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.9-1+deb11u1ubuntu0.1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.9-1",
        "3.9-1build1",
        "3.9-1+deb11u1build0.22.04.1",
        "3.9-1+deb11u1ubuntu0.1~esm1",
        "3.9-1+deb11u1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.16-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.16-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.16-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.14-1",
        "3.15-1",
        "3.16-1",
        "3.16-1build1",
        "3.16-1build2",
        "3.16-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "iperf3",
            "binary_version": "3.20-2"
          },
          {
            "binary_name": "libiperf0",
            "binary_version": "3.20-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "iperf3",
        "purl": "pkg:deb/ubuntu/iperf3@3.20-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.18-2",
        "3.19.1-2",
        "3.20-2"
      ]
    }
  ],
  "aliases": [],
  "details": "iperf3 3.20\u20133.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22",
  "id": "UBUNTU-CVE-2026-101283",
  "modified": "2026-10-02T00:00:00Z",
  "published": "2026-10-02T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-101283"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-101283"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/esnet/iperf/releases/tag/3.22"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/esnet/iperf/commit/e29f6504dcfac7d2961fed4fd66364115e36fe5a"
    },
    {
      "type": "REPORT",
      "url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-101283"
  ]
}

CVE-2026-101283 (GCVE-0-2026-101283)

Vulnerability from cvelistv5 – Published: 2026-09-30 21:32 – Updated: 2026-10-01 15:51

Summary

Severity

9.2 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-01 15:51 UTC

CWE

CWE-122 - Heap-based buffer overflow

Assigner

Anthropic mitre root Scorecard

References

1 reference

URL	Tags
https://newreleases.io/project/github/esnet/iperf…

Impacted products

1 product

Vendor	Product	Version
esnet	iperf3	Affected: 3.20 Affected: 3.21

Credits

Anthropic Ada Logics

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-101283",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-01T15:51:25.364045Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-01T15:51:37.669Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "iperf3",
          "vendor": "esnet",
          "versions": [
            {
              "status": "affected",
              "version": "3.20"
            },
            {
              "status": "affected",
              "version": "3.21"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Anthropic"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Ada Logics"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "iperf3 3.20\u20133.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22"
            }
          ],
          "value": "iperf3 3.20\u20133.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-100",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-100 Overflow Buffers"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.2,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122 Heap-based buffer overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T21:32:14.699Z",
        "orgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
        "shortName": "Anthropic"
      },
      "references": [
        {
          "url": "https://newreleases.io/project/github/esnet/iperf/release/3.22"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
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  },
  "cveMetadata": {
    "assignerOrgId": "98a01053-8a31-4f6d-9aa9-252be161adc6",
    "assignerShortName": "Anthropic",
    "cveId": "CVE-2026-101283",
    "datePublished": "2026-09-30T21:32:14.699Z",
    "dateReserved": "2026-09-28T12:01:09.970Z",
    "dateUpdated": "2026-10-01T15:51:37.669Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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UBUNTU-CVE-2026-101283 (CVE-2026-101283)

CVE-2026-101283 (GCVE-0-2026-101283)

Tags

Sightings

Nomenclature

Related by attack behaviour