FKIE_CVE-2025-40343

Vulnerability from fkie_nvd - Published: 2025-12-09 16:17 - Updated: 2026-10-15 22:19
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nvmet-fc: avoid scheduling association deletion twice When forcefully shutting down a port via the configfs interface, nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and then nvmet_disable_port(). Both functions will eventually schedule all remaining associations for deletion. The current implementation checks whether an association is about to be removed, but only after the work item has already been scheduled. As a result, it is possible for the first scheduled work item to free all resources, and then for the same work item to be scheduled again for deletion. Because the association list is an RCU list, it is not possible to take a lock and remove the list entry directly, so it cannot be looked up again. Instead, a flag (terminating) must be used to determine whether the association is already in the process of being deleted.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04d17540ef51e2c291eb863ca87fd332259b2d40
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f4852db87e25d4e226b25cb6f652fef9504360e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/601ed47b2363c24d948d7bac0c23abc8bd459570
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/85e2ce1920cb511d57aae59f0df6ff85b28bf04d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c09ac9a63fc3aaf4670ad7b5e4f5afd764424154
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2537be4f8421f6495edfa0bc284d722f253841d
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/fc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2f4852db87e25d4e226b25cb6f652fef9504360e",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            },
            {
              "lessThan": "85e2ce1920cb511d57aae59f0df6ff85b28bf04d",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            },
            {
              "lessThan": "601ed47b2363c24d948d7bac0c23abc8bd459570",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            },
            {
              "lessThan": "04d17540ef51e2c291eb863ca87fd332259b2d40",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            },
            {
              "lessThan": "c09ac9a63fc3aaf4670ad7b5e4f5afd764424154",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            },
            {
              "lessThan": "f2537be4f8421f6495edfa0bc284d722f253841d",
              "status": "affected",
              "version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/fc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-fc: avoid scheduling association deletion twice\n\nWhen forcefully shutting down a port via the configfs interface,\nnvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and\nthen nvmet_disable_port(). Both functions will eventually schedule all\nremaining associations for deletion.\n\nThe current implementation checks whether an association is about to be\nremoved, but only after the work item has already been scheduled. As a\nresult, it is possible for the first scheduled work item to free all\nresources, and then for the same work item to be scheduled again for\ndeletion.\n\nBecause the association list is an RCU list, it is not possible to take\na lock and remove the list entry directly, so it cannot be looked up\nagain. Instead, a flag (terminating) must be used to determine whether\nthe association is already in the process of being deleted."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvmet-fc: evitar programar la eliminaci\u00f3n de asociaciones dos veces\n\nAl apagar forzosamente un puerto a trav\u00e9s de la interfaz configfs, nvmet_port_subsys_drop_link() primero llama a nvmet_port_del_ctrls() y luego a nvmet_disable_port(). Ambas funciones eventualmente programar\u00e1n todas las asociaciones restantes para su eliminaci\u00f3n.\n\nLa implementaci\u00f3n actual verifica si una asociaci\u00f3n est\u00e1 a punto de ser eliminada, pero solo despu\u00e9s de que el elemento de trabajo ya ha sido programado. Como resultado, es posible que el primer elemento de trabajo programado libere todos los recursos, y luego que el mismo elemento de trabajo sea programado nuevamente para su eliminaci\u00f3n.\n\nDebido a que la lista de asociaciones es una lista RCU, no es posible tomar un bloqueo y eliminar la entrada de la lista directamente, por lo que no se puede buscar de nuevo. En su lugar, una bandera (terminating) debe usarse para determinar si la asociaci\u00f3n ya est\u00e1 en proceso de ser eliminada."
    }
  ],
  "id": "CVE-2025-40343",
  "lastModified": "2026-10-15T22:19:08.927",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40343",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-15T21:59:32.826461Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-09T16:17:44.650",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/04d17540ef51e2c291eb863ca87fd332259b2d40"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2f4852db87e25d4e226b25cb6f652fef9504360e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/601ed47b2363c24d948d7bac0c23abc8bd459570"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/85e2ce1920cb511d57aae59f0df6ff85b28bf04d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c09ac9a63fc3aaf4670ad7b5e4f5afd764424154"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f2537be4f8421f6495edfa0bc284d722f253841d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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