Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS resolver

{
  "id": "c4f4520accea15575f576def5a2c5583532e85c4357ab694a91a6ddad37e5d48",
  "url": "https://osv.dev/vulnerability/CVE-2026-102552",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP DNS resolver",
    "summary": "Improper verification of the source of a communication channel in the DNS resolver in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow remote third-party to insert a chosen address into the device's DNS cache via a forged DNS reply. To remediate this issue, users should upgrade to version V4.4.2 and enable ipconfigDNS_CHECK_REPLY_SOURCE_IP.",
    "evidence": "osv:CVE-2026-102552",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-102552",
      "aliases": [
        "CVE-2026-102552",
        "GHSA-h4fw-pv82-p7h5"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/freertos/freertos-plus-tcp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b86ad086e9870099bb0ac18a75dcb7f6dd508cc7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.4.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b86ad086e9870099bb0ac18a75dcb7f6dd508cc7"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "V4.4.2"
                  }
                ]
              }
            }
          ],
          "versions": [
            "V4.4.1",
            "V4.4.0",
            "V4.0.0-appsec",
            "V2.4.0",
            "V2.3.4",
            "V2.3.2",
            "V2.3.3",
            "V2.3.1",
            "V2.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102552.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:22.425653133Z",
      "provider": "osv",
      "references": [
        "https://aws.amazon.com/security/security-bulletins/2026-139-aws/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102552.json",
        "https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/security/advisories/GHSA-h4fw-pv82-p7h5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-102552",
        "https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/releases/tag/V4.4.2"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-940"
        ],
        "cna_assigner": "AMZN",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102552.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-102552",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488816,
  "published_at": "2026-10-16T17:28:47.578+00:00"
}