cimg — security advisory

{
  "id": "ea352bb07b1e797c8d71d7e751f15f5275512a1c34f8e166c8dc7c0912418ca9",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-47667",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-47667",
    "summary": "CImg Library is a C++ library for image processing. Prior to version 4.0.0 in `_load_analyze()`, the header_size field is read as an `unsigned int` from the first 4 bytes of an Analyze/NIfTI file and passed directly to `new unsigned char[header_size]` without being bounded against the actual file size. A value up to ~4 GB is accepted. If the subsequent `fread` returns `short` as it will for any malformed file), the function throws a `CImgIOException` and the allocated buffer is never freed. A 6-byte crafted file is sufficient to trigger an allocation of ~1.3 GB per call, with the full allocation leaked on every error path. The issue is reachable via `load_analyze()` and the generic `load()` when the file extension is .hdr, .img, or .nii. Version 4.0.0 fixes the issue.",
    "evidence": "osv:DEBIAN-CVE-2026-47667",
    "products": [
      {
        "name": {
          "value": "cimg",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.2.1+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2.1+dfsg-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.5.0+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.5.2+dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.5.2+dfsg-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "4.0.4+dfsg-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cimg",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.5.2+dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.5.2+dfsg-1+deb13u1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.5.2+dfsg-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.4+dfsg-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "cimg",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.0.4+dfsg-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "3.5.2+dfsg-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "3.5.2+dfsg-2",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-47667",
      "aliases": [
        "DEBIAN-CVE-2026-47667"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cimg",
            "purl": "pkg:deb/debian/cimg?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "3.2.1+dfsg-1",
            "3.2.1+dfsg-2",
            "3.5.0+dfsg-1",
            "3.5.2+dfsg-1",
            "3.5.2+dfsg-2",
            "4.0.4+dfsg-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47667.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "cimg",
            "purl": "pkg:deb/debian/cimg?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "3.5.2+dfsg-1",
            "3.5.2+dfsg-1+deb13u1",
            "3.5.2+dfsg-2",
            "4.0.4+dfsg-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47667.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.0.4+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "cimg",
            "purl": "pkg:deb/debian/cimg?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "3.5.2+dfsg-1",
            "3.5.2+dfsg-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47667.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-25T09:47:31.144555734Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-47667"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-47667"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-47667",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 445112,
  "published_at": "2026-07-21T20:17:01.323+00:00"
}