CVE-2026-23261 (GCVE-0-2026-23261)
Vulnerability from cvelistv5
Published
2026-03-18 17:41
Modified
2026-03-19 16:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-fc: release admin tagset if init fails nvme_fabrics creates an NVMe/FC controller in following path: nvmf_dev_write() -> nvmf_create_ctrl() -> nvme_fc_create_ctrl() -> nvme_fc_init_ctrl() nvme_fc_init_ctrl() allocates the admin blk-mq resources right after nvme_add_ctrl() succeeds. If any of the subsequent steps fail (changing the controller state, scheduling connect work, etc.), we jump to the fail_ctrl path, which tears down the controller references but never frees the admin queue/tag set. The leaked blk-mq allocations match the kmemleak report seen during blktests nvme/fc. Check ctrl->ctrl.admin_tagset in the fail_ctrl path and call nvme_remove_admin_tag_set() when it is set so that all admin queue allocations are reclaimed whenever controller setup aborts.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5fe335a80548e2eda5d51fab801108b323600e95
Version: 17c3a66d7ea2d303f783796d62f99e2e23b68c90
Version: ea3442efabd0aa3930c5bab73c3901ef38ef6ac3
Version: ea3442efabd0aa3930c5bab73c3901ef38ef6ac3
Version: 0d1840b2dd8fe073c020c39bf8e8e89488070801
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{
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          "defaultStatus": "unaffected",
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          "programFiles": [
            "drivers/nvme/host/fc.c"
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: release admin tagset if init fails\n\nnvme_fabrics creates an NVMe/FC controller in following path:\n\n    nvmf_dev_write()\n      -\u003e nvmf_create_ctrl()\n        -\u003e nvme_fc_create_ctrl()\n          -\u003e nvme_fc_init_ctrl()\n\nnvme_fc_init_ctrl() allocates the admin blk-mq resources right after\nnvme_add_ctrl() succeeds.  If any of the subsequent steps fail (changing\nthe controller state, scheduling connect work, etc.), we jump to the\nfail_ctrl path, which tears down the controller references but never\nfrees the admin queue/tag set.  The leaked blk-mq allocations match the\nkmemleak report seen during blktests nvme/fc.\n\nCheck ctrl-\u003ectrl.admin_tagset in the fail_ctrl path and call\nnvme_remove_admin_tag_set() when it is set so that all admin queue\nallocations are reclaimed whenever controller setup aborts."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-19T16:01:07.303Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01"
        },
        {
          "url": "https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8"
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      ],
      "title": "nvme-fc: release admin tagset if init fails",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23261",
    "datePublished": "2026-03-18T17:41:07.478Z",
    "dateReserved": "2026-01-13T15:37:45.990Z",
    "dateUpdated": "2026-03-19T16:01:07.303Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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