CVE-2026-93230 (GCVE-0-2026-93230)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:29 – Updated: 2026-10-21 12:52
VLAI
Title
mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 , < 326de479ab5942fb4a4aa4f20c716045434fcd6b (git)
Affected: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 , < 09505232eced5f1c42902d8f28740f070c3fc6dc (git)
Affected: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 , < 29968bc7aefb3cf1e72aa7c5f52697a6b0527094 (git)
Affected: fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 , < b1b7c045e808c761b1cc8c19b3040fadedda3fef (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.114 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "include/linux/hugetlb.h",
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            "mm/mm_init.c",
            "mm/sparse-vmemmap.c"
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          "vendor": "Linux",
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          "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:52:25.122Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
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    "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"
  },
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  "dataVersion": "5.2",
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        "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",
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        "metrics": {},
        "published": "2026-09-24T16:17:18.517",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93230.json",
      "version": "3"
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      "current_release_date": "2026-10-20T00:21:54Z",
      "cve": "CVE-2026-93230",
      "id": "CVE-2026-93230",
      "initial_release_date": "2026-09-24T23:49:36Z",
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      "title": "SUSE CVE CVE-2026-93230",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-93230.json",
      "version": "5"
    }
  }
}



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