CVE-2022-50285 (GCVE-0-2022-50285)
Vulnerability from cvelistv5
Published
2025-09-15 14:21
Modified
2025-09-15 14:21
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/112a005d1ded04a4b41b6d01833cc0bda90625cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11993652d0b49e27272db0a37aa828d8a3a4b92b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b35432d324898ec41beb27031d2a1a864a4d40e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/568e3812b1778b4c0c229649b59977d88f400ece
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c
Impacted products
Vendor Product Version
Linux Linux Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: a88c769548047b21f76fd71e04b6a3300ff17160
Version: 3f5fae4d1a3189d95b02b4b45e1218df147122bc
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   Linux Linux Version: 4.4
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{
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          "programFiles": [
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:21:21.504Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00c"
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      "title": "mm,hugetlb: take hugetlb_lock before decrementing h-\u003eresv_huge_pages",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50285",
    "datePublished": "2025-09-15T14:21:21.504Z",
    "dateReserved": "2025-09-15T13:58:00.977Z",
    "dateUpdated": "2025-09-15T14:21:21.504Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
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  }
}


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