ghsa-786c-r55j-68wj
Vulnerability from github
Published
2024-09-18 09:30
Modified
2024-09-20 18:32
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:

libfs: fix get_stashed_dentry()

get_stashed_dentry() tries to optimistically retrieve a stashed dentry from a provided location. It needs to ensure to hold rcu lock before it dereference the stashed location to prevent UAF issues. Use rcu_dereference() instead of READ_ONCE() it's effectively equivalent with some lockdep bells and whistles and it communicates clearly that this expects rcu protection.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-46801"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-18T08:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibfs: fix get_stashed_dentry()\n\nget_stashed_dentry() tries to optimistically retrieve a stashed dentry\nfrom a provided location.  It needs to ensure to hold rcu lock before it\ndereference the stashed location to prevent UAF issues.  Use\nrcu_dereference() instead of READ_ONCE() it\u0027s effectively equivalent\nwith some lockdep bells and whistles and it communicates clearly that\nthis expects rcu protection.",
  "id": "GHSA-786c-r55j-68wj",
  "modified": "2024-09-20T18:32:26Z",
  "published": "2024-09-18T09:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46801"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03e2a1209a83a380df34a72f7d6d1bc6c74132c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e32c25b58b945f976435bbe51f39b32d714052e"
    }
  ],
  "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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