CVE-2022-50285 (GCVE-0-2022-50285)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2025-09-15 14:21
VLAI?
Title
mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 3e50a07b6a5fcd39df1534d3fdaca4292a65efe6 (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 629c986e19fe9481227c7cdfd9a105bbc104d245 (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 2b35432d324898ec41beb27031d2a1a864a4d40e (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 11993652d0b49e27272db0a37aa828d8a3a4b92b (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 568e3812b1778b4c0c229649b59977d88f400ece (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 112a005d1ded04a4b41b6d01833cc0bda90625cc (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < c828fab903725279aa9dc6ae3d44bb7e4778f92c (git)
Affected: a88c769548047b21f76fd71e04b6a3300ff17160 , < 12df140f0bdfae5dcfc81800970dd7f6f632e00c (git)
Affected: 3f5fae4d1a3189d95b02b4b45e1218df147122bc (git)
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    Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 4.9.332 , ≤ 4.9.* (semver)
Unaffected: 4.14.298 , ≤ 4.14.* (semver)
Unaffected: 4.19.264 , ≤ 4.19.* (semver)
Unaffected: 5.4.223 , ≤ 5.4.* (semver)
Unaffected: 5.10.153 , ≤ 5.10.* (semver)
Unaffected: 5.15.76 , ≤ 5.15.* (semver)
Unaffected: 6.0.6 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "mm/hugetlb.c"
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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"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6"
        },
        {
          "url": "https://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245"
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        {
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          "url": "https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c"
        },
        {
          "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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