{
  "cveId": "CVE-2026-80821",
  "url": "https://patchblox.com/security/cve/CVE-2026-80821",
  "summary": "CVE-2026-80821 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80821 (version 7.1.12-1), 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:  nvmet: pci-epf: put CQ ref on create_cq mapping...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nvmet: pci-epf: put CQ ref on create_cq mapping failure  nvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a reference on the controller and installs the completion queue. If the subsequent PCI address-space mapping fails or returns a too-small partial mapping, the function jumps to err_internal / err_unmap_queue without calling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is gated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping succeeds, so teardown never releases these references. A remote PCI host that drives Create IO CQ commands with a failing PRP1/pci_addr therefore leaks the CQ and a controller reference on each attempt.  Drop the CQ reference on the mapping-failure paths. The err_internal and err_unmap_queue labels are only reachable after nvmet_cq_create() has succeeded, so this pairs the create/put correctly.",
  "published": "2026-09-04T16:18:09Z",
  "severity": "",
  "epss": 0.00209,
  "epssPercentile": 0.11084,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.12-1",
      "fix": "DEBIAN-CVE-2026-80821",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80821",
      "released": "2026-09-05T01:57:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}