UBUNTU-CVE-2026-47183 (CVE-2026-47183)

Vulnerability from osv_ubuntu – Published: 2026-07-17 19:17 – Updated: 2026-07-29 07:58 – Source website
VLAI
Details

Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.6, DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dictionary keyed by attacker-influenced IncomingDecodeError messages, retaining sys.exc_info() tracebacks whose frame locals kept raw packet self.data buffers and allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to drive memory growth until mDNS-dependent features degrade or the process is OOM-killed. This issue is fixed in version 0.149.6.

Severity
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python-zeroconf",
            "binary_version": "0.17.4-1"
          },
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.17.4-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.17.4-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.17.2-1",
        "0.17.4-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python-zeroconf",
            "binary_version": "0.19.1-1"
          },
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.19.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.19.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.19.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.24.4-0ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.24.4-0ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.21.3-1",
        "0.23.0-1",
        "0.24.4-0ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.38.3-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.38.3-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.26.1-1",
        "0.36.11-1",
        "0.36.12-1",
        "0.36.13-1",
        "0.37.0-1",
        "0.38.1-1",
        "0.38.3-1",
        "0.38.3-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.131.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.131.0-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.76.0-1",
        "0.119.0-1",
        "0.126.0-1",
        "0.127.0-1",
        "0.128.0-1",
        "0.128.0-2",
        "0.128.4-1",
        "0.129.0-1",
        "0.130.0-1",
        "0.131.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python3-zeroconf",
            "binary_version": "0.148.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "python-zeroconf",
        "purl": "pkg:deb/ubuntu/python-zeroconf@0.148.0-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.147.0-1",
        "0.148.0-1",
        "0.148.0-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Zeroconf is a pure Python implementation of multicast DNS service discovery. Prior to 0.149.6, DNSIncoming._log_exception_debug and the four QuietLogger exception-dedup methods stored an unbounded _seen_logs dictionary keyed by attacker-influenced IncomingDecodeError messages, retaining sys.exc_info() tracebacks whose frame locals kept raw packet self.data buffers and allowing unauthenticated hosts on the local link over UDP/5353 (224.0.0.251 / ff02::fb) to drive memory growth until mDNS-dependent features degrade or the process is OOM-killed. This issue is fixed in version 0.149.6.",
  "id": "UBUNTU-CVE-2026-47183",
  "modified": "2026-07-29T07:58:05Z",
  "published": "2026-07-17T19:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-47183"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-47183"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-zeroconf/python-zeroconf/security/advisories/GHSA-phvx-9mgw-67r5"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-zeroconf/python-zeroconf/issues/1714"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/python-zeroconf/python-zeroconf/pull/1717"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-47183"
  ]
}



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