openexr — security advisory

{
  "id": "d7178b462be0d315daf616818fe793b08ea556c1bec428fc438473477df3bdcc",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-34378",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-34378",
    "summary": "OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.",
    "evidence": "osv:DEBIAN-CVE-2026-34378",
    "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-2026-34378",
      "aliases": [
        "DEBIAN-CVE-2026-34378"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-2026-34378.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T09:47:29.410796330Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-34378"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-34378"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-34378",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460889,
  "published_at": "2026-04-06T16:16:35.057+00:00"
}