{
  "schema_version": "1.7.0",
  "id": "MGASA-2026-0247",
  "published": "2026-07-13T21:24:46Z",
  "modified": "2026-07-13T20:20:24Z",
  "summary": "Updated libheif packages fix security vulnerabilities",
  "details": "libheif has a Heap OOB Read/SEGV Crash via Zero samples_per_chunk.\n(CVE-2026-32738)\nlibheif is Vulnerable to Infinite Loop DoS via stts Sample Duration\nLookup. (CVE-2026-32739)\nHeap-Buffer-Overflow Write in Grid Tile Chroma Compositing.\n(CVE-2026-32740)\nlibheif has a heap buffer overflow in decode_mask_image().\n(CVE-2026-32741)\nUninitialized Heap Memory Information Leak via Failed Grid Tiles.\n(CVE-2026-32814)\nHeap Buffer OOB Read in overlay compositing due to wrong alpha stride.\n(CVE-2026-32882)\nstrukturag libheif stsz/stts track.cc load out-of-bounds.\n(CVE-2026-3950)\nlibheif allows Out-of-bounds vector access leading to invalid\ndereference (DoS). (CVE-2026-41069)\nHeap buffer over-read in SampleAuxInfoReader via crafted HEIF sequence\nfile with mismatched saiz sample count. (CVE-2026-41071)\nA critical heap-based buffer overflow vulnerability exists in libheif\nv1.21.2 (and likely earlier versions) within the handling of\nuncompressed HEIF images (ISO/IEC 23001-17, unci item type). When\nprocessing a tiled image with chroma subsampling (e.g., 4:2:0 or 4:2:2),\nthe library fails to scale spatial offsets for the chroma planes. This\nleads to out-of-bounds memory writes when decoding any tile other than\nthe top-left one, potentially resulting in remote code execution.\n(CVE-2026-47178)\nWrapped icef compressed-unit range check causes out-of-bounds read in\nuncompressed HEIF decoder. (CVE-2026-49271)\n",
  "upstream": [
    "CVE-2026-32738",
    "CVE-2026-32739",
    "CVE-2026-32740",
    "CVE-2026-32741",
    "CVE-2026-32814",
    "CVE-2026-32882",
    "CVE-2026-3950",
    "CVE-2026-41069",
    "CVE-2026-41071",
    "CVE-2026-47178",
    "CVE-2026-49271"
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://advisories.mageia.org/MGASA-2026-0247.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.mageia.org/show_bug.cgi?id=35729"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8454-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8479-1"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Mageia:10",
        "name": "libheif",
        "purl": "pkg:rpm/mageia/libheif?arch=source&distro=mageia-10"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.2-3.1.mga10"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "core"
      }
    },
    {
      "package": {
        "ecosystem": "Mageia:10",
        "name": "libheif",
        "purl": "pkg:rpm/mageia/libheif?arch=source&distro=mageia-10"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.2-3.1.mga10.tainted"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "tainted"
      }
    }
  ],
  "credits": [
    {
      "name": "Mageia",
      "type": "COORDINATOR",
      "contact": [
        "https://wiki.mageia.org/en/Packages_Security_Team"
      ]
    }
  ]
}