{
  "cveId": "CVE-2026-84451",
  "url": "https://patchblox.com/security/cve/CVE-2026-84451",
  "summary": "CVE-2026-84451 is fixed in 8 products on 1 platform, first by DEBIAN-CVE-2026-84451, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "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. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3.",
  "published": "2026-09-18T16:17:13Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.00311,
  "epssPercentile": 0.24067,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "heif-pixbuf-loader",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "heif-pixbuf-loader-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.23.4-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-84451",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84451",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "Debian 14",
      "fixedVersion": "1.23.3-1",
      "fix": "DEBIAN-CVE-2026-84451",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84451",
      "released": "2026-09-10T12:12:19Z"
    },
    {
      "platform": "linux",
      "product": "libheif",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "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"
    },
    {
      "platform": "linux",
      "product": "libheif-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libheif-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libheif-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libheif-tools",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libheif-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.23.4-1.amzn2023",
      "fix": "ALAS2023-2026-3124",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3124",
      "released": "2026-09-28T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}