{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6.12"
              },
              {
                "introduced": "2.7.0"
              },
              {
                "fixed": "2.14.6"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.2.4"
              },
              {
                "introduced": "3.3.0"
              },
              {
                "fixed": "3.3.1"
              },
              {
                "introduced": "3.4.0"
              },
              {
                "fixed": "3.4.2"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ac5c7b9014cd5b2bebf9c4b04dc229ca5a0a4338"
            },
            {
              "introduced": "eaeb0f593ad61fe77cf105c7ebbac44b60a13934"
            },
            {
              "fixed": "f052f239538ebc0df56835fdb57f7628628010bc"
            },
            {
              "introduced": "c53cd0a425e6f5483fbd971eb584b4360c306891"
            },
            {
              "fixed": "942570bf1f90701bba0c1e3bbca82569c1e966c2"
            },
            {
              "introduced": "94940169442298e2736af79720ef05d89a1b2a7d"
            },
            {
              "fixed": "4ba5a3b754ee4fd40f8ae0feb3aff7e6708aae4a"
            },
            {
              "introduced": "bf1d4c34c3b2b6267cd854346b1477854967264e"
            },
            {
              "fixed": "3d24aeecbb9bb5b4fc477904c44e032d6311e6d3"
            }
          ],
          "repo": "https://github.com/eprosima/fast-dds",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7r7h-hwfj-q626"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125",
      "CWE-131"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22590.json"
  },
  "details": "eprosima Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). Versions prior to 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 have a remotely triggerable Out-of-Bounds Read while processing RTPS `DATA_FRAG` submessages. An attacker can craft a `DATA_FRAG` with a large `sampleSize` but a small actual payload, and set `fragmentsInSubmessage` such that the receiver treats the packet as the LAST fragment**. In this LAST-fragment path, Fast-DDS computes `incoming_length` based on `sampleSize` and calls `memcpy()` without validating `incoming_data.length \u003e= incoming_length`. As a result, `CacheChange_t::add_fragments()` reads past the received UDP datagram buffer and into adjacent heap memory, copying those bytes into the reassembly buffer. In a Discovery Server deployment, the resulting `CacheChange_t` can be relayed to other participants, meaning that a newly joining participant may receive leaked heap memory (e.g., pointer values that could aid ASLR bypass). Versions 2.6.12, 2.14.6, 3.2.4, 3.3.1, and 3.4.2 fix the issue.",
  "id": "CVE-2026-22590",
  "modified": "2026-09-11T03:31:02.450134774Z",
  "published": "2026-09-09T15:43:28.589Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22590.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eProsima/Fast-DDS/security/advisories/GHSA-7r7h-hwfj-q626"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22590"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Fast-DDS Discovery Server: Out-of-Bounds Read \u0026 Heap Memory Disclosure via DATA_FRAG  sampleSize / fragmentsInSubmessage"
}