{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49889",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-49889"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "ext4: avoid use-after-free in ext4_ext_show_leaf()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid use-after-free in ext4_ext_show_leaf()\n\nIn ext4_find_extent(), path may be freed by error or be reallocated, so\nusing a previously saved *ppath may have been freed and thus may trigger\nuse-after-free, as follows:\n\next4_split_extent\n  path = *ppath;\n  ext4_split_extent_at(ppath)\n  path = ext4_find_extent(ppath)\n  ext4_split_extent_at(ppath)\n    // ext4_find_extent fails to free path\n    // but zeroout succeeds\n  ext4_ext_show_leaf(inode, path)\n    eh = path[depth].p_hdr\n    // path use-after-free !!!\n\nSimilar to ext4_split_extent_at(), we use *ppath directly as an input to\next4_ext_show_leaf(). Fix a spelling error by the way.\n\nSame problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only\nused in ext4_ext_show_leaf(), remove 'path' and use *ppath directly.\n\nThis issue is triggered only when EXT_DEBUG is defined and therefore does\nnot affect functionality.",
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        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1",
        "1:6.6.28-1+rpt1",
        "1:6.6.31-1+rpt1",
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        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49889"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b0cb4561fc4284d04e69c8a66c8504928ab2484e"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4999fed877bb64e3e7f9ab9996de2ca983c41928"
    },
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2eba3b0cc5b8de624918d21f32b5b8db59a90b39"
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      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/34b2096380ba475771971a778a478661a791aa15"
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    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8b114f2cc7dd5d36729d040b68432fbd0f0a8868"
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      "url": "https://git.kernel.org/stable/c/d483c7cc1796bd6a80e7b3a8fd494996260f6b67"
    },
    {
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      "url": "https://git.kernel.org/stable/c/4e2524ba2ca5f54bdbb9e5153bea00421ef653f5"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}