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nvmet: avoid recursive nvmet-wq flush in nvmet_ctrl_free

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: nvmet: avoid recursive nvmet-wq flush in nvmet_ctrl_free nvmet_tcp_release_queue_work() runs on nvmet-wq and can drop the final controller reference through nvmet_cq_put(). If that triggers nvmet_ctrl_free(), the teardown path flushes ctrl->async_event_work on the same nvmet-wq. Call chain: nvmet_tcp_schedule_release_queue() kref_put(&queue->kref, nvmet_tcp_release_queue) nvmet_tcp_release_queue() queue_work(nvmet_wq, &queue->release_work) <--- nvmet_wq process_one_work() nvmet_tcp_release_queue_work() nvmet_cq_put(&queue->nvme_cq) nvmet_cq_destroy() nvmet_ctrl_put(cq->ctrl) nvmet_ctrl_free() flush_work(&ctrl->async_event_work) <--- nvmet_wq Previously Scheduled by :- nvmet_add_async_event queue_work(nvmet_wq, &ctrl->async_event_work); This trips lockdep with a possible recursive locking warning. [ 5223.015876] run blktests nvme/003 at 2026-04-07 20:53:55 [ 5223.061801] loop0: detected capacity change from 0 to 2097152 [ 5223.072206] nvmet: adding nsid 1 to subsystem blktests-subsystem-1 [ 5223.088368] nvmet_tcp: enabling port 0 (127.0.0.1:4420) [ 5223.126086] nvmet: Created discovery controller 1 for subsystem nqn.2014-08.org.nvmexpress.discovery for NQN nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349. [ 5223.128453] nvme nvme1: new ctrl: NQN "nqn.2014-08.org.nvmexpress.discovery", addr 127.0.0.1:4420, hostnqn: nqn.2014-08.org.nvmexpress:uuid:0f01fb42-9f7f-4856-b0b3-51e60b8de349 [ 5233.1

Announced Source revision 1
Original source ↗

CVE-2026-46304

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-46304

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "ae5b0cad163833e10b271e9becc05d81dae56e5f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "8d66ba89480ff098a58d79003a505f383aa4e920",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "a696fbbd5240b4ac9b166f7bd4c550882ff543f1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "9a4d7222c0955b221e38bb66d10e6bccb672c8a1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "ee6e20c4bc9eae542a0954a368449532383169d4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "781f47d641432c26c19625b2cdd7f40825097592",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "551f445a56a11a6457550cddcf39c9ebb8bcacc6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "06406d81a2d7cfb8abcc4fa6cdfeb8e5897007c5",
        "lessThan": "aade8abd8b868b6ffa9697aadaea28ec7f65bee6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3976dd677e891c0b2c63d08028d445663539472c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "4.9.68",
        "lessThan": "4.10",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/nvme/target/core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.88",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.30",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/nvme/target/core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46304

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40171 · Revision 1
Added to Heist Feed
Publisher date
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