{
  "cveId": "CVE-2026-80896",
  "url": "https://patchblox.com/security/cve/CVE-2026-80896",
  "summary": "CVE-2026-80896 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80896 (version 7.1.8-1), released September 5, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mshv: Fix race in mshv_irqfd_deassign  mshv_irqf...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mshv: Fix race in mshv_irqfd_deassign  mshv_irqfd_deactivate() and the hlist traversal of pt_irqfds_list require pt-\u003Ept_irqfds_lock to be held, but mshv_irqfd_deassign() omits it. This races with the EPOLLHUP path in mshv_irqfd_wakeup(), which does take the lock before calling mshv_irqfd_deactivate().  Additionally, mshv_irqfd_deactivate() uses hlist_del() which poisons the node pointers rather than resetting them. Since mshv_irqfd_is_active() relies on hlist_unhashed() (checks pprev == NULL), a poisoned node still appears active. If a concurrent path calls mshv_irqfd_deactivate() again on the same irqfd, the guard fails to prevent a double hlist_del() on poisoned pointers.  Fix both issues: - Add the missing spin_lock_irq/spin_unlock_irq around the list   traversal in mshv_irqfd_deassign(), matching mshv_irqfd_release(). - Use hlist_del_init() instead of hlist_del() so the node is properly   marked as unhashed after removal, making the is_active guard reliable.",
  "published": "2026-09-04T18:17:57Z",
  "severity": "",
  "epss": 0.00206,
  "epssPercentile": 0.10781,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.8-1",
      "fix": "DEBIAN-CVE-2026-80896",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80896",
      "released": "2026-09-05T01:57:10Z"
    }
  ],
  "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"
  }
}