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UBUNTU-CVE-2026-84446

Type: advisorySource: OSV1 source record

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::init_sample_timing_table() compute a logical m_num_output_samples value that exceeds the uint32_t counters used by Track_Visual::decode_next_image_sample() and Track::get_next_sample_raw_data(). The resulting comparison can never reach the oversized output count, causing non-terminating decode or raw-sample loops and bypassing max_sequence_frames. The same sequence path repeatedly calls Box_stts::get_sample_duration() and allocates Chunk::m_sample_ranges and Track::m_presentation_timeline outside MemoryHandle accounting, allowing severe CPU and memory exhaustion from a small file. This issue is fixed in version 1.23.2.

Announced Source revision 1
Original source ↗

UBUNTU-CVE-2026-84446

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-84446

libheif

Source reference: /affected/0/package/name

Affected versions
1.20.2-1

Source reference: /affected/0/versions

1.20.2-2

Source reference: /affected/0/versions

1.20.2-2build1

Source reference: /affected/0/versions

1.20.2-2build2

Source reference: /affected/0/versions

1.20.2-2ubuntu1

Source reference: /affected/0/versions

1.21.2-1

Source reference: /affected/0/versions

1.21.2-3

Source reference: /affected/0/versions

1.21.2-3ubuntu0.1

Source reference: /affected/0/versions

1.21.2-3ubuntu0.2

Source reference: /affected/0/versions

1.21.2-3ubuntu0.3

Source reference: /affected/0/versions

1.21.2-3ubuntu0.4

Source reference: /affected/0/versions

1.21.2-3ubuntu0.5

Source reference: /affected/0/versions

Fixed versions
1.21.2-3ubuntu0.6

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.21.2-3ubuntu0.6"
          }
        ]
      }
    ],
    "package": {
      "name": "libheif",
      "purl": "pkg:deb/ubuntu/libheif?arch=source&distro=resolute",
      "ecosystem": "Ubuntu:26.04:LTS"
    },
    "versions": [
      "1.20.2-1",
      "1.20.2-2",
      "1.20.2-2build1",
      "1.20.2-2build2",
      "1.20.2-2ubuntu1",
      "1.21.2-1",
      "1.21.2-3",
      "1.21.2-3ubuntu0.1",
      "1.21.2-3ubuntu0.2",
      "1.21.2-3ubuntu0.3",
      "1.21.2-3ubuntu0.4",
      "1.21.2-3ubuntu0.5"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84446.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "heif-gdk-pixbuf",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "heif-thumbnailer",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "heif-view",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-examples",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-aomdec",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-aomenc",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-dav1d",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-ffmpegdec",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-j2kdec",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-j2kenc",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-jpegdec",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-jpegenc",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-kvazaar",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-libde265",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-rav1e",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-svtenc",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugin-x265",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif-plugins-all",
          "binary_version": "1.21.2-3ubuntu0.6"
        },
        {
          "binary_name": "libheif1",
          "binary_version": "1.21.2-3ubuntu0.6"
        }
      ],
      "availability": "No subscription required"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#65227 · Revision 1
Added to Heist Feed
Publisher date
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