HDF5 scale-offset filter heap buffer over-read via crafted chunk

{
  "id": "84ac069825b53e0f089c9fbbeb879e3e9fd192e9a2861d668cc51e474b202e82",
  "url": "https://osv.dev/vulnerability/CVE-2026-19029",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "HDF5 scale-offset filter heap buffer over-read via crafted chunk",
    "summary": "A heap-based buffer over-read in H5Z__filter_scaleoffset() in src/H5Zscaleoffset.c in HDF5 through 2.2.0 lets an attacker cause a denial of service (application crash) with a crafted HDF5 file. When the stored minimum bits equal the full precision of the datatype, the decoder copies d_nelmts * size bytes from the compressed chunk without checking that the chunk holds that many bytes. Both values come from attacker-controlled scale-offset filter parameters in the dataset's filter pipeline message.",
    "evidence": "osv:CVE-2026-19029",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-19029",
      "aliases": [
        "CVE-2026-19029"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hdfgroup/hdf5",
              "type": "GIT",
              "events": [
                {
                  "introduced": "577c192518598c7e2945683655feffcdbdf5a91b"
                },
                {
                  "fixed": "49df1b4e5ca4108d56e80f06321a749da1535268"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "5"
                      },
                      {
                        "last_affected": "2.2.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-19029.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.614431845Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19029.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-19029",
        "https://github.com/HDFGroup/hdf5/pull/6718"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-125"
        ],
        "cna_assigner": "HDFG",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19029.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-19029",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513724,
  "published_at": "2026-10-06T20:01:36.34+00:00"
}