OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

{
  "id": "524a89b1e09c5de98772af58d2f2f53dce4721197203ad9369057dbf5708f10f",
  "url": "https://osv.dev/vulnerability/CVE-2025-64182",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()",
    "summary": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.2.0 through 3.2.4, 3.3.0 through 3.3.5, and 3.4.0 through 3.4.2, a memory safety bug in the legacy OpenEXR Python adapter (the deprecated OpenEXR.InputFile wrapper) allow crashes and likely code execution when opening attacker-controlled EXR files or when passing crafted Python objects. Integer overflow and unchecked allocation in InputFile.channel() and InputFile.channels() can lead to heap overflow (32 bit) or a NULL deref (64 bit). Versions 3.2.5, 3.3.6, and 3.4.3 contain a patch for the issue.",
    "evidence": "osv:CVE-2025-64182",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-64182",
      "aliases": [
        "CVE-2025-64182",
        "GHSA-vh63-9mqx-wmjr",
        "PYSEC-2026-2851"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/academysoftwarefoundation/openexr",
              "type": "GIT",
              "events": [
                {
                  "introduced": "456bf42dc2fddb647c0e9ab911656e5cf757fc36"
                },
                {
                  "fixed": "59fe81b806151d870648f702442b83730e6e6473"
                },
                {
                  "introduced": "c7d3eac70ccde2c4ed484c6638b83ba872f71464"
                },
                {
                  "fixed": "027f33284f146d91bf983a58c8ea50c36154f339"
                },
                {
                  "introduced": "20a65852895894434bea88613f6d29ac8e88bd6e"
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                {
                  "fixed": "042c83d28dc8ad754f970800a651509ca61a0570"
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              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.2.0"
                      },
                      {
                        "fixed": "3.2.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.3.0"
                      },
                      {
                        "fixed": "3.3.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.4.0"
                      },
                      {
                        "fixed": "3.4.3"
                      }
                    ],
                    "source": "CPE_RANGE"
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          "versions": [
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            "v3.3.6-rc3",
            "v3.4.3-rc2",
            "v3.2.4-rc2",
            "v3.2.4",
            "v3.3.6-rc2",
            "v3.4.3-rc",
            "v3.3.6-rc",
            "v3.3.5",
            "v3.4.2-rc2",
            "v3.4.2",
            "v3.4.2-rc",
            "v3.4.1-rc2",
            "v3.4.1",
            "v3.4.1-rc",
            "v3.4.0",
            "v3.3.5-rc3",
            "v3.3.5-rc",
            "v3.3.4-rc",
            "v3.3.4",
            "v3.3.3-rc1",
            "v3.3.3",
            "v3.3.3-rc",
            "v3.3.2-rc4",
            "v3.3.2",
            "v3.3.2-rc3",
            "v3.3.2-rc2",
            "v3.3.2-rc",
            "v3.3.1-rc",
            "v3.3.1",
            "v3.3.0-rc2",
            "v3.3.0",
            "v3.2.4-rc",
            "v3.2.3-rc2",
            "v3.2.3",
            "v3.2.3-rc",
            "v3.2.2",
            "v3.2.2-rc2",
            "v3.2.2-rc",
            "v3.2.1-rc",
            "v3.2.1",
            "v3.2.0-rc4",
            "v3.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64182.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.344187975Z",
      "provider": "osv",
      "references": [
        "https://github.com/AcademySoftwareFoundation/openexr/blob/b3a19903db0672c63055023aa788e592b16ec3c5/src/wrappers/python/PyOpenEXR_old.cpp#L528-L536",
        "https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vh63-9mqx-wmjr",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64182.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-64182"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-120"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64182.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-64182",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 516702,
  "published_at": "2025-11-10T21:27:21.176+00:00"
}