ghsa-v5r4-g8jp-rvxf
Vulnerability from github
Published
2024-05-21 15:31
Modified
2024-12-24 18:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

udf: Fix NULL pointer dereference in udf_symlink function

In function udf_symlink, epos.bh is assigned with the value returned by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c and returns the value of sb_getblk function that could be NULL. Then, epos.bh is used without any check, causing a possible NULL pointer dereference when sb_getblk fails.

This fix adds a check to validate the value of epos.bh.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47353"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:21Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh.",
  "id": "GHSA-v5r4-g8jp-rvxf",
  "modified": "2024-12-24T18:30:49Z",
  "published": "2024-05-21T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47353"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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