{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-50199",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-50199"
  ],
  "published": "2024-11-08T05:54:39Z",
  "summary": "mm/swapfile: skip HugeTLB pages for unuse_vma",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/swapfile: skip HugeTLB pages for unuse_vma\n\nI got a bad pud error and lost a 1GB HugeTLB when calling swapoff.  The\nproblem can be reproduced by the following steps:\n\n 1. Allocate an anonymous 1GB HugeTLB and some other anonymous memory.\n 2. Swapout the above anonymous memory.\n 3. run swapoff and we will get a bad pud error in kernel message:\n\n  mm/pgtable-generic.c:42: bad pud 00000000743d215d(84000001400000e7)\n\nWe can tell that pud_clear_bad is called by pud_none_or_clear_bad in\nunuse_pud_range() by ftrace.  And therefore the HugeTLB pages will never\nbe freed because we lost it from page table.  We can skip HugeTLB pages\nfor unuse_vma to fix it.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-50199"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ba7f982cdb37ff5a7739dec85d7325ea66fc1496"
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      "url": "https://git.kernel.org/stable/c/417d5838ca73c6331ae2fe692fab6c25c00d9a0b"
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}