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CVE-2025-38084 is a race condition in the Linux kernel hugetlb memory-management subsystem during virtual memory area (VMA) splitting. The affected path caused __split_vma() to invoke hugetlb page-table unsharing via vm_ops->may_split() before acquiring the VMA and reverse-mapping locks. Concurrent VMA-locked page faults in the same process or reverse-mapping walks in other processes could consequently re-share page tables before the VMA split completed, defeating the intended protection. The fix invokes hugetlb unsharing within __split_vma() at the corresponding huge-page split stage, after the VMA and reverse-mapping locks are write-locked.
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A Linux kernel mm/hugetlb flaw involving page-table unsharing during virtual memory area splitting.
A Linux kernel hugetlb memory-management issue involving page-table unsharing during a VMA split.
A Linux kernel hugetlb race condition in VMA splitting. Page-table unsharing was performed before required VMA and reverse-mapping locks were acquired, allowing concurrent operations to re-share page tables before the split. The fix moves unsharing into the appropriately write-locked split path.
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Cross-references every affected SKU, including bundled OEM variants.
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