{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.14.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "60a439dd4febfcd78e3779e952fe3fbf3c16bb1f"
            },
            {
              "fixed": "232d7cac38fbb8baeb900150d683e61da288ae75"
            }
          ],
          "repo": "https://github.com/coredns/coredns",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9rvv-m5g5-wc8r"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62309.json"
  },
  "details": "CoreDNS is a DNS server written in Go. Prior to 1.14.4, a single 28-byte UDP datagram can crash the CoreDNS process when the proxyproto plugin is enabled because plugin/pkg/proxyproto/proxyproto.go PacketConn.ReadFrom handles a PROXY v2 header with non-UDP transport such as family byte 0x11, reassigns addr from a nil readFrom result after parseProxyProtocol errors, and calls addr.String() in the warning log before ServeDNS recovery applies. This issue is fixed in version 1.14.4.",
  "id": "CVE-2026-62309",
  "modified": "2026-07-19T03:30:57.515299278Z",
  "published": "2026-07-16T19:42:17.867Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/coredns/coredns/releases/tag/v1.14.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62309.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/coredns/coredns/security/advisories/GHSA-9rvv-m5g5-wc8r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62309"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coredns/coredns/commit/60a439dd4febfcd78e3779e952fe3fbf3c16bb1f"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coredns/coredns/pull/8154"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CoreDNS: proxyproto plugin panics on PPv2 datagram with non-UDP transport — single 28-byte packet remote DoS"
}