openexr — security advisory

{
  "id": "e901e9ea3aecfc1eb41f6cbdccd438f103ceff7f51e506decfa84a8f0ccb1c47",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-45696",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-45696",
    "summary": "OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.11, the HTJ2K (High-Throughput JPEG 2000) decoder, ht_undo_impl() in OpenEXRCore is vulnerable to a heap-buffer-overflow READ. The ht_undo_imp function copies decoded pixels out of a per-line OpenJPH buffer using the EXR channel's declared width as the iteration count. The codestream embedded in the EXR chunk can declare different (smaller) tile/line dimensions than the EXR header advertises, but ht_undo_impl() does not validate this — it pulls width 32-bit samples from cur_line->i32[] without checking the OpenJPH line buffer's actual length. A crafted EXR file produces a 4-byte heap-buffer-overflow READ immediately after a buffer allocated by ojph::local::codestream::finalize_alloc(). The bug is reachable through the standard scanline-decode entry point used by every consumer of exr_decoding_run/Imf::checkOpenEXRFile, including thumbnailers, asset pipelines, and the exrcheck utility — i.e. any application that opens untrusted EXR files. The result is a deterministic crash (DoS) and potential adjacent-heap leak. This issue has been fixed in version 3.4.12.",
    "evidence": "osv:DEBIAN-CVE-2026-45696",
    "products": [
      {
        "name": {
          "value": "openexr",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.4.14-0.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "3.1.13-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.6+ds-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.6+ds-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.6+ds-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.4.6+ds-4",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-45696",
      "aliases": [
        "DEBIAN-CVE-2026-45696"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.4.14-0.1"
                }
              ]
            }
          ],
          "package": {
            "name": "openexr",
            "purl": "pkg:deb/debian/openexr?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "3.1.13-2",
            "3.4.6+ds-1",
            "3.4.6+ds-2",
            "3.4.6+ds-3",
            "3.4.6+ds-4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-45696.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:28.707416058Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-45696"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-45696"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-45696",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450753,
  "published_at": "2026-06-18T21:16:28.917+00:00"
}