ubuntu-cve-2026-32741
Vulnerability from osv_ubuntu
Published
2026-05-19 21:16
Modified
2026-06-30 16:20
Summary
Details

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and below contain a heap buffer overflow in MaskImageCodec::decode_mask_image(). When decoding a HEIF file containing a mask image (mski), the function copies the full iloc extent data into a pixel buffer using memcpy(dst, data.data(), data.size()). The copy length data.size() is determined by the iloc extent in the file (attacker-controlled), while the destination buffer is sized based on the declared image dimensions. Because no upper-bound check exists on the data length, a crafted file whose iloc extent exceeds the pixel buffer allocation overflows the heap. The vulnerable single-memcpy branch is reached when the mskC property specifies bits_per_pixel = 8 and the ispe property declares an even width ≥ 64 (so that stride == width), with no changes to default security limits or external codec plugins required. This issue has been fixed in version 1.22.0.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.17.6-1ubuntu4.4"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.17.6-1ubuntu4.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.17.6-1ubuntu4.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.6-1ubuntu4.4"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.20.2-1ubuntu0.4"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.20.2-1ubuntu0.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.20.2-1ubuntu0.4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.2-1ubuntu0.4"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.21.2-3ubuntu0.1"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.21.2-3ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.21.2-3ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.21.2-3ubuntu0.1"
            }
          ],
          "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"
      ]
    }
  ],
  "aliases": [],
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and below contain a heap buffer overflow in MaskImageCodec::decode_mask_image(). When decoding a HEIF file containing a mask image (mski), the function copies the full iloc extent data into a pixel buffer using memcpy(dst, data.data(), data.size()). The copy length data.size() is determined by the iloc extent in the file (attacker-controlled), while the destination buffer is sized based on the declared image dimensions. Because no upper-bound check exists on the data length, a crafted file whose iloc extent exceeds the pixel buffer allocation overflows the heap. The vulnerable single-memcpy branch is reached when the mskC property specifies bits_per_pixel = 8 and the ispe property declares an even width \u2265 64 (so that stride == width), with no changes to default security limits or external codec plugins required. This issue has been fixed in version 1.22.0.",
  "id": "UBUNTU-CVE-2026-32741",
  "modified": "2026-06-30T16:20:54Z",
  "published": "2026-05-19T21:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-32741"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-32741"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.22.0"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j3w5-7whq-p37q"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8454-1"
    }
  ],
  "related": [
    "USN-8454-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-32741"
  ]
}



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Nomenclature

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