{
  "cveId": "CVE-2025-40340",
  "url": "https://patchblox.com/security/cve/CVE-2025-40340",
  "summary": "CVE-2025-40340 is fixed in 18 products on 1 platform, first by DEBIAN-CVE-2025-40340, released December 9, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "drm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.  I saw an oops in xe_gem_fault when running the xe-fast-feedback testlist against the realtime kernel without debug options enabled.  The panic happens after core_hotunplug unbind-rebind finishes. Presumably what happens is that a process mmaps, unlocks because of the FAULT_FLAG_RETRY_NOWAIT logic, has no process memory left, causing ttm_bo_vm_dummy_page() to return VM_FAULT_NOPAGE, since there was nothing left to populate, and then oopses in \u0022mem_type_is_vram(tbo-\u003Eresource-\u003Emem_type)\u0022 because tbo-\u003Eresource is NULL.  It\u0027s convoluted, but fits the data and explains the oops after the test exits.",
  "published": "2025-12-09T16:17:44Z",
  "severity": "Moderate",
  "cvss": 7,
  "epss": 0.00219,
  "epssPercentile": 0.12464,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40340",
  "fixes": [
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      "released": "2026-01-28T14:34:30Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}