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UnratedFix available

Fix CVE(s): CVE-2023-32067

Type: advisorySources: OSV

* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067

Products
libc-ares-dev, libc-ares2
Affected versions
Not specified
Fixed versions
1.14.0-1ubuntu0.2+tuxcare.els1
CVEs
CVE-2023-32067
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 11:41 UTC · Revision 1

Source evidence

Fix CVE(s): CVE-2023-32067

core-osv · Original source

Published 25 Aug 2026, 13:12 UTC

* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067

osv:CLSA-2026-1787663550

libc-ares-dev

Fixed versions: 1.14.0-1ubuntu0.2+tuxcare.els1

libc-ares2

Fixed versions: 1.14.0-1ubuntu0.2+tuxcare.els1

Complete source record
{
  "id": "f9cda821e5e0e807fe23de90a691e9815ec14b5ce2a61709111fe3dd0c77c118",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1787663550",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2023-32067",
    "summary": "* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067",
    "evidence": "osv:CLSA-2026-1787663550",
    "products": [
      {
        "name": {
          "value": "libc-ares-dev",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.14.0-1ubuntu0.2+tuxcare.els1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libc-ares2",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.14.0-1ubuntu0.2+tuxcare.els1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1787663550",
      "aliases": [
        "CLSA-2026-1787663550"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.14.0-1ubuntu0.2+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libc-ares-dev",
            "purl": "pkg:deb/tuxcare/libc-ares-dev?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787663550.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.14.0-1ubuntu0.2+tuxcare.els1"
                }
              ]
            }
          ],
          "package": {
            "name": "libc-ares2",
            "purl": "pkg:deb/tuxcare/libc-ares2?distro=ubuntu-18.04",
            "ecosystem": "TuxCare:Ubuntu:18.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787663550.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:03.616423618Z",
      "provider": "osv",
      "upstream": [
        "CVE-2023-32067"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1787663550.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-32067"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2023-32067",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449536,
  "published_at": "2026-08-25T13:12:41+00:00"
}