ghsa-6w2x-xmw9-v3hc
Vulnerability from github
Published
2025-03-12 00:31
Modified
2025-03-12 00:31
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

sysctl: Fix data races in proc_douintvec_minmax().

A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing.

This patch changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49640"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:39Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsysctl: Fix data races in proc_douintvec_minmax().\n\nA sysctl variable is accessed concurrently, and there is always a chance\nof data-race.  So, all readers and writers need some basic protection to\navoid load/store-tearing.\n\nThis patch changes proc_douintvec_minmax() to use READ_ONCE() and\nWRITE_ONCE() internally to fix data-races on the sysctl side.  For now,\nproc_douintvec_minmax() itself is tolerant to a data-race, but we still\nneed to add annotations on the other subsystem\u0027s side.",
  "id": "GHSA-6w2x-xmw9-v3hc",
  "modified": "2025-03-12T00:31:48Z",
  "published": "2025-03-12T00:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49640"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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