mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier

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Summary

CVECVE-2026-93230
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 16:17:18 UTC
Updated2026-09-24 16:17:18 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 09505232eced5f1c42902d8f28740f070c3fc6dc git Not specified
CNA Linux Linux affected fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 29968bc7aefb3cf1e72aa7c5f52697a6b0527094 git Not specified
CNA Linux Linux affected fde1c4ecf91640e5a95ec36b71ec2e8ec379ce40 b1b7c045e808c761b1cc8c19b3040fadedda3fef git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/09505232eced5f1c42902d8f28740f070c3fc6dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b1b7c045e808c761b1cc8c19b3040fadedda3fef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/29968bc7aefb3cf1e72aa7c5f52697a6b0527094 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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