{
  "cveId": "CVE-2026-74600",
  "url": "https://patchblox.com/security/cve/CVE-2026-74600",
  "summary": "CVE-2026-74600 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-74600, released September 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "mm/page_table_check: skip special zero mappings",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/page_table_check: skip special zero mappings  page_table_check_set() and page_table_check_clear() account mappings based on PageAnon().  Shared zero-page PTEs and huge zero PMDs are special mappings, but page_table_check can still account them as file-backed pages.  An unprivileged process can populate enough zero mappings to overflow file_map_count and hit the existing BUG_ON().  The PTE path can do this with the shared zero page, and the PMD path can do the same with huge zero mappings.  Skip special zero mappings in the user page-table accounting paths.  Keep the PTE-side pte_special() check, and identify huge zero PMDs from the mapped folio instead of pmd_special().  That covers architectures where pmd_special() is a no-op without adding huge_zero_pfn checks to the generic counter helpers.",
  "published": "2026-08-22T16:16:32Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00173,
  "epssPercentile": 0.06786,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74600",
  "fixes": [
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      "released": "2026-11-07T00:43:02Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}