{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "08e7756c3900bcfd77a720e7b74e27d6e4ed01a9"
            },
            {
              "fixed": "4084152e040329ca0194c4c1750b9b46d00a5b6b"
            },
            {
              "fixed": "f2f1465f2d2e5c61dfeac4d20fd093797d821139"
            }
          ],
          "repo": "https://github.com/openssl/openssl",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "openssl",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14456.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "4.0.0"
          },
          {
            "fixed": "4.0.2"
          },
          {
            "introduced": "3.6.0"
          },
          {
            "fixed": "3.6.4"
          },
          {
            "introduced": "3.5.0"
          },
          {
            "fixed": "3.5.8"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes\nvalid QUIC Initial packets for unknown destination connection IDs, it\ncan allocate and queue new incoming channels without enforcing any limit.\n\nImpact summary: A remote peer that can make many Initial packets reach the\nserver listener faster than the application accepts connections, can cause the\nmemory allocated to store the per-channel state to grow without any limits,\npotentially making the QUIC listener unavailable and causing Denial of Service.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: The function that handles inbound QUIC packets uses\nConnection-Id from the packet header to find an existing connection\n(QUIC channel). If no existing connection is found and the packet\ntype is INITIAL, the function treats the packet as a new connection. It\nallocates a new channel object and inserts it into a queue where it\nwaits to be accepted by the local application with SSL_accept(3ossl).\nThe memory occupied by these initial channel objects may grow\nwithout bounds if the application is not able to call SSL_accept()\nfrequently enough to serve these inbound connection requests.\n\nThe issue is present since OpenSSL 3.5 when the QUIC server implementation\nwas added.\n\nThe fix introduces a limit for pending connections. The default limit is set\nto 256 pending connections (waiting to be accepted by the local application).\nApplications may change the default by calling SSL_set_value_uint(3ossl).\n\nFIPS impact: no\nThe FIPS module is not affected as the QUIC implementation is outside of\nthe OpenSSL FIPS module boundary.",
  "id": "CVE-2026-14456",
  "modified": "2026-08-15T11:30:54.515182924Z",
  "published": "2026-08-13T13:55:52.370Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/13/4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14456.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14456"
    },
    {
      "type": "ADVISORY",
      "url": "https://openssl-library.org/news/secadv/20260813.txt"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openssl/openssl/commit/08e7756c3900bcfd77a720e7b74e27d6e4ed01a9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openssl/openssl/commit/4084152e040329ca0194c4c1750b9b46d00a5b6b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openssl/openssl/commit/f2f1465f2d2e5c61dfeac4d20fd093797d821139"
    }
  ],
  "schema_version": "1.9.0",
  "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": "Unbounded Memory Growth in QUIC Server Incoming Channel Queue"
}