{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56619",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56619"
  ],
  "published": "2024-12-27T14:59:59Z",
  "summary": "nilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()\n\nSyzbot reported that when searching for records in a directory where the\ninode's i_size is corrupted and has a large value, memory access outside\nthe folio/page range may occur, or a use-after-free bug may be detected if\nKASAN is enabled.\n\nThis is because nilfs_last_byte(), which is called by nilfs_find_entry()\nand others to calculate the number of valid bytes of directory data in a\npage from i_size and the page index, loses the upper 32 bits of the 64-bit\nsize information due to an inappropriate type of local variable to which\nthe i_size value is assigned.\n\nThis caused a large byte offset value due to underflow in the end address\ncalculation in the calling nilfs_find_entry(), resulting in memory access\nthat exceeds the folio/page size.\n\nFix this issue by changing the type of the local variable causing the bit\nloss from \"unsigned int\" to \"u64\".  The return value of nilfs_last_byte()\nis also of type \"unsigned int\", but it is truncated so as not to exceed\nPAGE_SIZE and no bit loss occurs, so no change is required.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56619"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/09d6d05579fd46e61abf6e457bb100ff11f3a9d3"
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      "url": "https://git.kernel.org/stable/c/c3afea07477baccdbdec4483f8d5e59d42a3f67f"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
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}