ghsa-hf6g-m6v3-8gj5
Vulnerability from github
Published
2025-10-01 12:30
Modified
2025-10-01 12:30
Details

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

nfs: fix possible null-ptr-deref when parsing param

According to commit "vfs: parse: deal with zero length string value", kernel will set the param->string to null pointer in vfs_parse_fs_string() if fs string has zero length.

Yet the problem is that, nfs_fs_context_parse_param() will dereferences the param->string, without checking whether it is a null pointer, which may trigger a null-ptr-deref bug.

This patch solves it by adding sanity check on param->string in nfs_fs_context_parse_param().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50455"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs: fix possible null-ptr-deref when parsing param\n\nAccording to commit \"vfs: parse: deal with zero length string value\",\nkernel will set the param-\u003estring to null pointer in vfs_parse_fs_string()\nif fs string has zero length.\n\nYet the problem is that, nfs_fs_context_parse_param() will dereferences the\nparam-\u003estring, without checking whether it is a null pointer, which may\ntrigger a null-ptr-deref bug.\n\nThis patch solves it by adding sanity check on param-\u003estring\nin nfs_fs_context_parse_param().",
  "id": "GHSA-hf6g-m6v3-8gj5",
  "modified": "2025-10-01T12:30:28Z",
  "published": "2025-10-01T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50455"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46819f604557fe7bc39a6c352fd368371aa9cd6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55513864b418c6453d68aebc36cffcf965342426"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5559405df652008e56eee88872126fe4c451da67"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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