CVE-2026-93230 (GCVE-0-2026-93230)
Vulnerability from cvelistv5
Published
2026-09-24 15:29
Modified
2026-10-21 12:52
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
Impacted products
Vendor Product Version
Linux Linux Version: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40
Version: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40
Version: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40
Version: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": [
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        },
        {
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          "product": "Linux",
          "programFiles": [
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            "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": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "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",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.114",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:52:25.122Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/326de479ab5942fb4a4aa4f20c716045434fcd6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/09505232eced5f1c42902d8f28740f070c3fc6dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/29968bc7aefb3cf1e72aa7c5f52697a6b0527094"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1b7c045e808c761b1cc8c19b3040fadedda3fef"
        }
      ],
      "title": "mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93230",
    "datePublished": "2026-09-24T15:29:16.067Z",
    "dateReserved": "2026-09-17T16:02:15.094Z",
    "dateUpdated": "2026-10-21T12:52:25.122Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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