{
  "cveId": "CVE-2026-84444",
  "url": "https://patchblox.com/security/cve/CVE-2026-84444",
  "summary": "CVE-2026-84444 is fixed in libheif on 1 platform, first by DEBIAN-CVE-2026-84444, released September 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libheif: libheif is a HEIF and AVIF file format decoder and encoder",
  "description": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITH_UNCOMPRESSED_CODEC is enabled, heif_context_add_image_tile() accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image. ImageItem_uncompressed::add_image_tile() passes that tile directly to unc_encoder::encode_tile(), which lacked the check_component_sizes() gate and sizes its output from the configured tile geometry while copying the tile\u0027s actual component-plane dimensions. An oversized component plane can therefore make unc_encoder_component_interleave::encode_tile() copy attacker-controlled data beyond the heap output buffer. This issue is fixed in version 1.23.2.",
  "published": "2026-09-18T16:17:12Z",
  "severity": "high",
  "cvss": 7.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
  "epss": 0.00478,
  "epssPercentile": 0.41495,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libheif",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.23.4-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-84444",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84444",
      "released": "2026-09-19T18:30:58Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "Debian 14",
      "fixedVersion": "1.23.2-1",
      "fix": "DEBIAN-CVE-2026-84444",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84444",
      "released": "2026-09-19T18:30:58Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.23.4-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21889-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21889-1",
      "released": "2026-09-20T12:44:23Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "sles 15.7",
      "fixedVersion": "1.23.4-150700.3.21.1",
      "fix": "SUSE-SU-2026:4276-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4276-1",
      "released": "2026-09-21T09:21:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}