{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.19.6"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2fff74c0a2627af87370e88aa1b92ca87ed45c9e"
            }
          ],
          "repo": "https://github.com/strukturag/libheif",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2c3g-p585-8rpq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125",
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84449.json"
  },
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6.",
  "id": "CVE-2026-84449",
  "modified": "2026-09-19T03:30:19.375162679Z",
  "published": "2026-09-18T16:03:28.532Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84449.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.19.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84449"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV"
}