FKIE_CVE-2026-93230

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-24 16:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier Gigantic bootmem HugeTLB pages are currently initialized from hugetlb_init(), but page_alloc_init_late() runs earlier and walks pageblocks to determine zone contiguity. If a bootmem HugeTLB region is marked noinit, set_zone_contiguous() can observe still-uninitialized struct pages through __pageblock_pfn_to_page(). This may not trigger an immediate failure, but it can make set_zone_contiguous() compute the wrong zone contiguity state. If extra poisoned-page checks are added in this path, such as PF_POISONED_CHECK() in page_zone_id(), it can also trigger an early boot panic. Initialize gigantic bootmem HugeTLB struct pages from page_alloc_init_late(), before zone contiguity is evaluated, so later page allocator setup only sees valid struct page state. This also makes the initialization order more natural, as struct pages should be initialized before later code inspects them.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09505232eced5f1c42902d8f28740f070c3fc6dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29968bc7aefb3cf1e72aa7c5f52697a6b0527094
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1b7c045e808c761b1cc8c19b3040fadedda3fef
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/hugetlb.h",
            "mm/hugetlb.c",
            "mm/mm_init.c",
            "mm/sparse-vmemmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "09505232eced5f1c42902d8f28740f070c3fc6dc",
              "status": "affected",
              "version": "fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40",
              "versionType": "git"
            },
            {
              "lessThan": "29968bc7aefb3cf1e72aa7c5f52697a6b0527094",
              "status": "affected",
              "version": "fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40",
              "versionType": "git"
            },
            {
              "lessThan": "b1b7c045e808c761b1cc8c19b3040fadedda3fef",
              "status": "affected",
              "version": "fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/hugetlb.h",
            "mm/hugetlb.c",
            "mm/mm_init.c",
            "mm/sparse-vmemmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier\n\nGigantic bootmem HugeTLB pages are currently initialized from\nhugetlb_init(), but page_alloc_init_late() runs earlier and walks\npageblocks to determine zone contiguity.\n\nIf a bootmem HugeTLB region is marked noinit, set_zone_contiguous() can\nobserve still-uninitialized struct pages through\n__pageblock_pfn_to_page().  This may not trigger an immediate failure, but\nit can make set_zone_contiguous() compute the wrong zone contiguity state.\nIf extra poisoned-page checks are added in this path, such as\nPF_POISONED_CHECK() in page_zone_id(), it can also trigger an early boot\npanic.\n\nInitialize gigantic bootmem HugeTLB struct pages from\npage_alloc_init_late(), before zone contiguity is evaluated, so later page\nallocator setup only sees valid struct page state.  This also makes the\ninitialization order more natural, as struct pages should be initialized\nbefore later code inspects them."
    }
  ],
  "id": "CVE-2026-93230",
  "lastModified": "2026-09-24T16:17:18.517",
  "metrics": {},
  "published": "2026-09-24T16:17:18.517",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09505232eced5f1c42902d8f28740f070c3fc6dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29968bc7aefb3cf1e72aa7c5f52697a6b0527094"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1b7c045e808c761b1cc8c19b3040fadedda3fef"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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