UBUNTU-CVE-2026-50142 (CVE-2026-50142)

Vulnerability from osv_ubuntu – Published: 2026-07-02 00:00 – Updated: 2026-09-02 16:18 – Source website
VLAI
Details

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.20.2-1ubuntu0.6"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.20.2-1ubuntu0.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.20.2-1ubuntu0.6?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.2-1ubuntu0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.19.7-1",
        "1.19.8-1",
        "1.20.2-1",
        "1.20.2-1ubuntu0.1",
        "1.20.2-1ubuntu0.3",
        "1.20.2-1ubuntu0.4",
        "1.20.2-1ubuntu0.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.21.2-3ubuntu0.3"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.21.2-3ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.21.2-3ubuntu0.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.21.2-3ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.",
  "id": "UBUNTU-CVE-2026-50142",
  "modified": "2026-09-02T16:18:22Z",
  "published": "2026-07-02T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-50142"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-50142"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-jvmp-j3cw-84mh"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8526-1"
    }
  ],
  "related": [
    "USN-8526-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-50142"
  ]
}



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