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UBUNTU-CVE-2026-62291 (CVE-2026-62291)

Vulnerability from osv_ubuntu – Published: 2026-08-20 00:00 – Updated: 2026-09-18 21:18 – Source website
VLAI
Details

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted image sequence with a 2x2 primary plane and a 256x256 auxiliary alpha plane can cause attacker-controlled heap corruption during a normal decode and re-encode workflow. Track_Visual::decode_next_image_sample() calls transfer_channel_from_image_as() without checking that the auxiliary alpha dimensions match the main frame. The resulting inconsistent image reaches heif_track_decode_next_image() and then heif_context_encode_image(). In unc_encoder::encode(), unc_encoder_component_interleave::encode_tile() sizes its buffer with compute_tile_data_size_bytes() using the primary dimensions but copies each component using its actual plane dimensions. The oversized alpha plane is therefore copied beyond the allocation, causing an out-of-bounds write; the inverse size mismatch can also produce an out-of-bounds read. This issue is fixed in version 1.23.1.


{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.17.6-1ubuntu4.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.17.6-1ubuntu4.8?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.6-1ubuntu4.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16.2-2ubuntu1",
        "1.17.1-1ubuntu2",
        "1.17.1-1ubuntu3",
        "1.17.4-1ubuntu1",
        "1.17.6-1ubuntu1",
        "1.17.6-1ubuntu2",
        "1.17.6-1ubuntu3",
        "1.17.6-1ubuntu4",
        "1.17.6-1ubuntu4.1",
        "1.17.6-1ubuntu4.2",
        "1.17.6-1ubuntu4.3",
        "1.17.6-1ubuntu4.4",
        "1.17.6-1ubuntu4.5",
        "1.17.6-1ubuntu4.6",
        "1.17.6-1ubuntu4.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.21.2-3ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.21.2-3ubuntu0.5?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.21.2-3ubuntu0.5"
            }
          ],
          "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",
        "1.21.2-3ubuntu0.3",
        "1.21.2-3ubuntu0.4"
      ]
    }
  ],
  "aliases": [],
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted image sequence with a 2x2 primary plane and a 256x256 auxiliary alpha plane can cause attacker-controlled heap corruption during a normal decode and re-encode workflow. Track_Visual::decode_next_image_sample() calls transfer_channel_from_image_as() without checking that the auxiliary alpha dimensions match the main frame. The resulting inconsistent image reaches heif_track_decode_next_image() and then heif_context_encode_image(). In unc_encoder::encode(), unc_encoder_component_interleave::encode_tile() sizes its buffer with compute_tile_data_size_bytes() using the primary dimensions but copies each component using its actual plane dimensions. The oversized alpha plane is therefore copied beyond the allocation, causing an out-of-bounds write; the inverse size mismatch can also produce an out-of-bounds read. This issue is fixed in version 1.23.1.",
  "id": "UBUNTU-CVE-2026-62291",
  "modified": "2026-09-18T21:18:31Z",
  "published": "2026-08-20T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62291"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-62291"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/commit/ac5521ad50399885de96bb6a0733a5d2442740f9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-xpw3-9rhw-482x"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8683-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8774-1"
    }
  ],
  "related": [
    "USN-8683-1",
    "USN-8774-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-62291"
  ]
}



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