CVE-2026-80821

Full vulnerability record from the local CVENow database.

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-04 16:18:09.857000

Last modified

2026-10-19 09:17:16.970000

View original CVE JSON

{
  "id": "CVE-2026-80821",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-04T16:18:09.857",
  "lastModified": "2026-10-19T09:17:16.970",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: pci-epf: put CQ ref on create_cq mapping failure\n\nnvmet_pci_epf_create_cq() calls nvmet_cq_create(), which takes a\nreference on the controller and installs the completion queue. If the\nsubsequent PCI address-space mapping fails or returns a too-small partial\nmapping, the function jumps to err_internal / err_unmap_queue without\ncalling nvmet_cq_put(). The matching put in nvmet_pci_epf_delete_cq() is\ngated on NVMET_PCI_EPF_Q_LIVE, which is only set after the mapping\nsucceeds, so teardown never releases these references. A remote PCI host\nthat drives Create IO CQ commands with a failing PRP1/pci_addr therefore\nleaks the CQ and a controller reference on each attempt.\n\nDrop the CQ reference on the mapping-failure paths. The err_internal and\nerr_unmap_queue labels are only reachable after nvmet_cq_create() has\nsucceeded, so this pairs the create/put correctly."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/nvme/target/pci-epf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186",
              "lessThan": "f31650243c1ab32394077f234685e89ed8dece84",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186",
              "lessThan": "b5f97fae2503a763fa0f953abf5f121b0fef7d0d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186",
              "lessThan": "56a7b6a6880dbabe28214ff88df8d229ca3a944a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "0faa0fe6f90ea59b10d1b0f15ce0eb0c18eff186",
              "lessThan": "659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/nvme/target/pci-epf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.14",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.47",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.11",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.1",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/56a7b6a6880dbabe28214ff88df8d229ca3a944a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/659ae9d02cb5d72c76f74fff7441eb8fb64d8f5c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5f97fae2503a763fa0f953abf5f121b0fef7d0d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f31650243c1ab32394077f234685e89ed8dece84",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}