ghsa-qf78-3cfm-29pm
Vulnerability from github
Published
2024-10-21 15:32
Modified
2024-11-08 18:30
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix potential oob read in nilfs_btree_check_delete()

The function nilfs_btree_check_delete(), which checks whether degeneration to direct mapping occurs before deleting a b-tree entry, causes memory access outside the block buffer when retrieving the maximum key if the root node has no entries.

This does not usually happen because b-tree mappings with 0 child nodes are never created by mkfs.nilfs2 or nilfs2 itself. However, it can happen if the b-tree root node read from a device is configured that way, so fix this potential issue by adding a check for that case.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-47757"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T13:15:05Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential oob read in nilfs_btree_check_delete()\n\nThe function nilfs_btree_check_delete(), which checks whether degeneration\nto direct mapping occurs before deleting a b-tree entry, causes memory\naccess outside the block buffer when retrieving the maximum key if the\nroot node has no entries.\n\nThis does not usually happen because b-tree mappings with 0 child nodes\nare never created by mkfs.nilfs2 or nilfs2 itself.  However, it can happen\nif the b-tree root node read from a device is configured that way, so fix\nthis potential issue by adding a check for that case.",
  "id": "GHSA-qf78-3cfm-29pm",
  "modified": "2024-11-08T18:30:44Z",
  "published": "2024-10-21T15:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47757"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/257f9e5185eb6de83377caea686c306e22e871f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a33e967b681e088a125b979975c93e3453e686cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8abfda768b9f33630cfbc4af6c4214f1e5681b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4cbcc64bb31e67e02940ce060cc77f7180564cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4f8554996e8ada3be872dfb8f60e93bcf15fb27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d20674f31626e0596ae4c1d9401dfb6739b81b58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed76d381dae125b81d09934e365391a656249da8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3a9859767c7aea758976f5523903d247e585129"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9c96351aa6718b42a9f42eaf7adce0356bdb5e8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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