CVE-2026-14456 (GCVE-0-2026-14456)
Vulnerability from cvelistv5
Published
2026-08-13 13:55
Modified
2026-08-13 17:41
Severity ?
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Summary
Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes valid QUIC Initial packets for unknown destination connection IDs, it can allocate and queue new incoming channels without enforcing any limit. Impact summary: A remote peer that can make many Initial packets reach the server listener faster than the application accepts connections, can cause the memory allocated to store the per-channel state to grow without any limits, potentially making the QUIC listener unavailable and causing Denial of Service. CWE: CWE-770: Allocation of Resources Without Limits or Throttling Description: The function that handles inbound QUIC packets uses Connection-Id from the packet header to find an existing connection (QUIC channel). If no existing connection is found and the packet type is INITIAL, the function treats the packet as a new connection. It allocates a new channel object and inserts it into a queue where it waits to be accepted by the local application with SSL_accept(3ossl). The memory occupied by these initial channel objects may grow without bounds if the application is not able to call SSL_accept() frequently enough to serve these inbound connection requests. The issue is present since OpenSSL 3.5 when the QUIC server implementation was added. The fix introduces a limit for pending connections. The default limit is set to 256 pending connections (waiting to be accepted by the local application). Applications may change the default by calling SSL_set_value_uint(3ossl). FIPS impact: no The FIPS module is not affected as the QUIC implementation is outside of the OpenSSL FIPS module boundary.
References
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: 4.0.0   ≤
Version: 3.6.0   ≤
Version: 3.5.0   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-13T16:18:19.434Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/13/4"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-14456",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T17:41:23.819585Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-13T17:41:29.420Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "4.0.2",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.6.4",
              "status": "affected",
              "version": "3.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.8",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Filipe Casal (Trail of Bits)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Alexandr Nedvedicky"
        }
      ],
      "datePublic": "2026-08-13T07:00:13.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes\u003cbr\u003evalid QUIC Initial packets for unknown destination connection IDs, it\u003cbr\u003ecan allocate and queue new incoming channels without enforcing any limit.\u003cbr\u003e\u003cbr\u003eImpact summary: A remote peer that can make many Initial packets reach the\u003cbr\u003eserver listener faster than the application accepts connections, can cause the\u003cbr\u003ememory allocated to store the per-channel state to grow without any limits,\u003cbr\u003epotentially making the QUIC listener unavailable and causing Denial of Service.\u003cbr\u003e\u003cbr\u003eCWE: CWE-770: Allocation of Resources Without Limits or Throttling\u003cbr\u003e\u003cbr\u003eDescription: The function that handles inbound QUIC packets uses\u003cbr\u003eConnection-Id from the packet header to find an existing connection\u003cbr\u003e(QUIC channel). If no existing connection is found and the packet\u003cbr\u003etype is INITIAL, the function treats the packet as a new connection. It\u003cbr\u003eallocates a new channel object and inserts it into a queue where it\u003cbr\u003ewaits to be accepted by the local application with SSL_accept(3ossl).\u003cbr\u003eThe memory occupied by these initial channel objects may grow\u003cbr\u003ewithout bounds if the application is not able to call SSL_accept()\u003cbr\u003efrequently enough to serve these inbound connection requests.\u003cbr\u003e\u003cbr\u003eThe issue is present since OpenSSL 3.5 when the QUIC server implementation\u003cbr\u003ewas added.\u003cbr\u003e\u003cbr\u003eThe fix introduces a limit for pending connections. The default limit is set\u003cbr\u003eto 256 pending connections (waiting to be accepted by the local application).\u003cbr\u003eApplications may change the default by calling SSL_set_value_uint(3ossl).\u003cbr\u003e\u003cbr\u003eFIPS impact: no\u003cbr\u003eThe FIPS module is not affected as the QUIC implementation is outside of\u003cbr\u003ethe OpenSSL FIPS module boundary."
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "format": "other",
          "other": {
            "content": {
              "text": "Low"
            },
            "type": "https://openssl-library.org/policies/general/security-policy/"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T13:55:52.370Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
      },
      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://openssl-library.org/news/secadv/20260813.txt"
        },
        {
          "name": "4.0 branch git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/f2f1465f2d2e5c61dfeac4d20fd093797d821139"
        },
        {
          "name": "3.6 branch git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/4084152e040329ca0194c4c1750b9b46d00a5b6b"
        },
        {
          "name": "3.5 branch git commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/openssl/openssl/commit/08e7756c3900bcfd77a720e7b74e27d6e4ed01a9"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Unbounded Memory Growth in QUIC Server Incoming Channel Queue",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2026-14456",
    "datePublished": "2026-08-13T13:55:52.370Z",
    "dateReserved": "2026-07-02T08:35:57.518Z",
    "dateUpdated": "2026-08-13T17:41:29.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2026/08/13/4\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-08-13T16:18:19.434Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-14456\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-13T17:41:23.819585Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-13T17:41:12.508Z\"}}], \"cna\": {\"title\": \"Unbounded Memory Growth in QUIC Server Incoming Channel Queue\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Filipe Casal (Trail of Bits)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Alexandr Nedvedicky\"}], \"metrics\": [{\"other\": {\"type\": \"https://openssl-library.org/policies/general/security-policy/\", \"content\": {\"text\": \"Low\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.0.0\", \"lessThan\": \"4.0.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.6.0\", \"lessThan\": \"3.6.4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.5.0\", \"lessThan\": \"3.5.8\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-08-13T07:00:13.000Z\", \"references\": [{\"url\": \"https://openssl-library.org/news/secadv/20260813.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/f2f1465f2d2e5c61dfeac4d20fd093797d821139\", \"name\": \"4.0 branch git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/4084152e040329ca0194c4c1750b9b46d00a5b6b\", \"name\": \"3.6 branch git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/08e7756c3900bcfd77a720e7b74e27d6e4ed01a9\", \"name\": \"3.5 branch git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes\u003cbr\u003evalid QUIC Initial packets for unknown destination connection IDs, it\u003cbr\u003ecan allocate and queue new incoming channels without enforcing any limit.\u003cbr\u003e\u003cbr\u003eImpact summary: A remote peer that can make many Initial packets reach the\u003cbr\u003eserver listener faster than the application accepts connections, can cause the\u003cbr\u003ememory allocated to store the per-channel state to grow without any limits,\u003cbr\u003epotentially making the QUIC listener unavailable and causing Denial of Service.\u003cbr\u003e\u003cbr\u003eCWE: CWE-770: Allocation of Resources Without Limits or Throttling\u003cbr\u003e\u003cbr\u003eDescription: The function that handles inbound QUIC packets uses\u003cbr\u003eConnection-Id from the packet header to find an existing connection\u003cbr\u003e(QUIC channel). If no existing connection is found and the packet\u003cbr\u003etype is INITIAL, the function treats the packet as a new connection. It\u003cbr\u003eallocates a new channel object and inserts it into a queue where it\u003cbr\u003ewaits to be accepted by the local application with SSL_accept(3ossl).\u003cbr\u003eThe memory occupied by these initial channel objects may grow\u003cbr\u003ewithout bounds if the application is not able to call SSL_accept()\u003cbr\u003efrequently enough to serve these inbound connection requests.\u003cbr\u003e\u003cbr\u003eThe issue is present since OpenSSL 3.5 when the QUIC server implementation\u003cbr\u003ewas added.\u003cbr\u003e\u003cbr\u003eThe fix introduces a limit for pending connections. The default limit is set\u003cbr\u003eto 256 pending connections (waiting to be accepted by the local application).\u003cbr\u003eApplications may change the default by calling SSL_set_value_uint(3ossl).\u003cbr\u003e\u003cbr\u003eFIPS impact: no\u003cbr\u003eThe FIPS module is not affected as the QUIC implementation is outside of\u003cbr\u003ethe OpenSSL FIPS module boundary.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2026-08-13T13:55:52.370Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-14456\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-13T17:41:29.420Z\", \"dateReserved\": \"2026-07-02T08:35:57.518Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2026-08-13T13:55:52.370Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.