CVE-2026-59186 affecting package OpenEXR 2.3.0-6

{
  "id": "bd6dde1430fb5694c6c23200d8a0350e7b15f446a77e99541781a1bee808e45b",
  "url": "https://osv.dev/vulnerability/AZL-97643",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-59186 affecting package OpenEXR 2.3.0-6",
    "summary": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.",
    "evidence": "osv:AZL-97643",
    "products": [
      {
        "name": {
          "value": "OpenEXR",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-97643",
      "aliases": [
        "AZL-97643"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2.3.0-6"
                }
              ]
            }
          ],
          "package": {
            "name": "OpenEXR",
            "purl": "pkg:rpm/azure-linux/OpenEXR",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-97643.json"
          }
        }
      ],
      "modified": "2026-10-22T05:37:13Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-59186"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-59186"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-59186",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 404550,
  "published_at": "2026-08-25T17:17:36+00:00"
}