GHSA-M6MF-PH7P-75J2

Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-04 21:31
VLAI?
Details

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

mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages

The h->*_huge_pages counters are protected by the hugetlb_lock, but alloc_huge_page has a corner case where it can decrement the counter outside of the lock.

This could lead to a corrupted value of h->resv_huge_pages, which we have observed on our systems.

Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a potential race.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-50285"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:39Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm,hugetlb: take hugetlb_lock before decrementing h-\u003eresv_huge_pages\n\nThe h-\u003e*_huge_pages counters are protected by the hugetlb_lock, but\nalloc_huge_page has a corner case where it can decrement the counter\noutside of the lock.\n\nThis could lead to a corrupted value of h-\u003eresv_huge_pages, which we have\nobserved on our systems.\n\nTake the hugetlb_lock before decrementing h-\u003eresv_huge_pages to avoid a\npotential race.",
  "id": "GHSA-m6mf-ph7p-75j2",
  "modified": "2025-12-04T21:31:01Z",
  "published": "2025-09-15T15:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/112a005d1ded04a4b41b6d01833cc0bda90625cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11993652d0b49e27272db0a37aa828d8a3a4b92b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b35432d324898ec41beb27031d2a1a864a4d40e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/568e3812b1778b4c0c229649b59977d88f400ece"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c"
    }
  ],
  "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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