{
  "cveId": "CVE-2025-40174",
  "url": "https://patchblox.com/security/cve/CVE-2025-40174",
  "summary": "CVE-2025-40174 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40174 (version 6.17.6-1), released November 12, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  x86/mm: Fix SMP ordering in switch_mm_irqs_off()...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  x86/mm: Fix SMP ordering in switch_mm_irqs_off()  Stephen noted that it is possible to not have an smp_mb() between the loaded_mm store and the tlb_gen load in switch_mm(), meaning the ordering against flush_tlb_mm_range() goes out the window, and it becomes possible for switch_mm() to not observe a recent tlb_gen update and fail to flush the TLBs.  [ dhansen: merge conflict fixed by Ingo ]",
  "published": "2025-11-12T11:15:47Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00144,
  "epssPercentile": 0.03715,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.6-1",
      "fix": "DEBIAN-CVE-2025-40174",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-40174",
      "released": "2025-11-12T11:15:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}