{
  "cveId": "CVE-2026-93218",
  "url": "https://patchblox.com/security/cve/CVE-2026-93218",
  "summary": "CVE-2026-93218 is fixed in linux on 1 platform by DEBIAN-CVE-2026-93218 (version 7.2.6-1), released September 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/huge_memory: skip device-private PMDs in madv...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/huge_memory: skip device-private PMDs in madvise_free_huge_pmd  madvise_free_pte_range() checks pmd_trans_huge(*pmd) unlocked, then madvise_free_huge_pmd() takes pmd_trans_huge_lock().  pmd_is_huge() returns true for a device-private PMD, so orig_pmd can be device-private and enter the !pmd_present() branch.  Skip device-private PMDs in that non-present branch and continue to out before calling pmd_folio().  Downgrade the check to VM_WARN_ON_ONCE() so an unexpected PMD softleaf logs a warning rather than panicking.  Drop the thp_migration_supported() guard: it expands to IS_ENABLED(CONFIG_ARCH_SUPPORTS_PMD_SOFTLEAF), and both pmd_is_migration_entry() and pmd_is_device_private_entry() already return false when that config is not selected, so the guard suppresses only the case where the warning would already be silent.  Potential trigger: an HMM-based GPU driver races with madvise(MADV_FREE): migrate_vma_pages() flips the PMD to a device-private entry between the caller\u0027s pmd_trans_huge() check and the callee\u0027s pmd_trans_huge_lock().",
  "published": "2026-09-24T16:17:16Z",
  "severity": "",
  "epss": 0.00155,
  "epssPercentile": 0.04711,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-93218",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93218",
      "released": "2026-09-24T19:30:44Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}