ghsa-w52v-vrvm-954m
Vulnerability from github
Published
2024-08-07 18:30
Modified
2025-11-04 00:31
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:

cachefiles: add missing lock protection when polling

Add missing lock protection in poll routine when iterating xarray, otherwise:

Even with RCU read lock held, only the slot of the radix tree is ensured to be pinned there, while the data structure (e.g. struct cachefiles_req) stored in the slot has no such guarantee. The poll routine will iterate the radix tree and dereference cachefiles_req accordingly. Thus RCU read lock is not adequate in this case and spinlock is needed here.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-42250"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-07T16:15:47Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: add missing lock protection when polling\n\nAdd missing lock protection in poll routine when iterating xarray,\notherwise:\n\nEven with RCU read lock held, only the slot of the radix tree is\nensured to be pinned there, while the data structure (e.g. struct\ncachefiles_req) stored in the slot has no such guarantee.  The poll\nroutine will iterate the radix tree and dereference cachefiles_req\naccordingly.  Thus RCU read lock is not adequate in this case and\nspinlock is needed here.",
  "id": "GHSA-w52v-vrvm-954m",
  "modified": "2025-11-04T00:31:11Z",
  "published": "2024-08-07T18:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42250"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bb6bd3dd6f382dfd36220d4b210a0c77c066651"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8eadcab7f3dd809edbe5ae20533ff843dfea3a07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97cfd5e20ddc2e33e16ce369626ce76c9a475fd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf5bb09e742a9cf6349127e868329a8f69b7a014"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "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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