{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-53207",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-53207"
  ],
  "published": "2026-06-25T08:41:40Z",
  "summary": "mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison\n\nTwo concurrent madvise(MADV_HWPOISON) calls on the same hugetlb page can\ntrigger a recursive spinlock self-deadlock (AA deadlock) on hugetlb_lock\nwhen racing with a concurrent unmap:\n\n  thread#0                              thread#1\n  --------                              --------\n  madvise(folio, MADV_HWPOISON)\n    -> poisons the folio successfully\n  madvise(folio, MADV_HWPOISON)         unmap(folio)\n    try_memory_failure_hugetlb\n      get_huge_page_for_hwpoison\n        spin_lock_irq(&hugetlb_lock)    <- held\n        __get_huge_page_for_hwpoison\n          hugetlb_update_hwpoison()\n            -> MF_HUGETLB_FOLIO_PRE_POISONED\n          goto out:\n            folio_put()\n              refcount: 1 -> 0\n              free_huge_folio()\n                spin_lock_irqsave(&hugetlb_lock)\n                  -> AA DEADLOCK!\n\nThe out: path in __get_huge_page_for_hwpoison() calls folio_put() to drop\nthe GUP reference while the hugetlb_lock is still held by the hugetlb.c\nwrapper get_huge_page_for_hwpoison().  If concurrent unmap has released\nthe page table mapping reference, folio_put() drops the folio refcount to\nzero, triggering free_huge_folio() which attempts to re-acquire the\nnon-recursive hugetlb_lock.\n\nFix this by moving hugetlb_lock acquisition from the hugetlb.c wrapper\ninto get_huge_page_for_hwpoison().  Place spin_unlock_irq() before the\nfolio_put() at the out: label so the folio is always released outside the\nlock.\n\n[akpm@linux-foundation.org: fix race, rename label per Miaohe]",
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      "url": "https://git.kernel.org/stable/c/bf7ba8f96c258c30393814491930ae4ecdc5fe5e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-25T08:41:40Z"
  }
}