Potential denial of service when configured to send Retry packets in s2n-quic

{
  "id": "8198500bf17b36681987302539f09d360e8b069e72f2df9596108d954aaa31c4",
  "url": "https://osv.dev/vulnerability/CVE-2026-94450",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Potential denial of service when configured to send Retry packets in s2n-quic",
    "summary": "Improper validation of the Destination Connection ID length in s2n-quic 1.88.0 and earlier may allow an unauthenticated remote user to cause a denial of service by shutting down a server endpoint via a single crafted UDP datagram. Only server endpoints specifically configured to send Retry packets are affected. To remediate this issue, users should upgrade to version v1.89.0 or later.",
    "evidence": "osv:CVE-2026-94450",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-94450",
      "aliases": [
        "CVE-2026-94450",
        "GHSA-5rw2-6x5m-v22x"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/aws/s2n-quic",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "845f1cce431e30fc9c3802fda0a7fb0d65c201be"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.88.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "845f1cce431e30fc9c3802fda0a7fb0d65c201be"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.89.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.88.0",
            "v1.87.0",
            "v1.86.0",
            "v1.85.0",
            "v1.84.0",
            "v1.83.0",
            "v1.82.0",
            "v1.81.0",
            "v1.80.0",
            "v1.79.0",
            "v1.78.0",
            "v1.77.0",
            "v1.76.0",
            "v1.75.0",
            "v1.74.0",
            "v1.73.0",
            "v1.72.0",
            "v1.71.0",
            "v1.70.0",
            "v1.69.0",
            "v1.68.0",
            "v1.67.0",
            "v1.66.0",
            "v1.65",
            "v1.64.0",
            "v1.63.0",
            "v1.62.0",
            "v1.61.0",
            "v1.60.0",
            "v1.59.0",
            "v1.58.0",
            "v1.57.0",
            "v1.56.0",
            "v1.55.0",
            "v1.54.0",
            "v1.52.1",
            "v1.52.0",
            "v1.51.0",
            "v1.50.0",
            "v1.49.0",
            "v1.48.0",
            "v1.47.0",
            "v1.46.0",
            "v1.45.0",
            "v1.43.0",
            "v1.42.0",
            "v1.41.0",
            "v1.40.0",
            "v1.39.0",
            "v1.38.1",
            "v1.38.0",
            "v1.37.0",
            "v1.36.0",
            "v1.35.1",
            "v1.35.0",
            "v1.34.0",
            "v1.33.0",
            "v1.32.0",
            "v1.31.0",
            "v1.30.0",
            "v1.29.0",
            "v1.28.0",
            "v1.27.0",
            "v1.26.0",
            "v1.25.0",
            "v1.24.0",
            "v1.23.0",
            "v1.22.0",
            "v1.21.0",
            "v1.20.0",
            "v1.19.0",
            "v1.18.0",
            "v1.17.1",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.2",
            "v1.9.1",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.1",
            "v1.6.0",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.1",
            "v1.1.0",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-94450.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.990503793Z",
      "provider": "osv",
      "references": [
        "https://aws.amazon.com/security/security-bulletins/2026-116-aws/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94450.json",
        "https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-94450",
        "https://github.com/aws/s2n-quic/releases/tag/v1.89.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1284",
          "CWE-617"
        ],
        "cna_assigner": "AMZN",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94450.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-94450",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491652,
  "published_at": "2026-09-22T20:04:44.36+00:00"
}