Vulnerability-Lookup

CVE-2026-64321 (GCVE-0-2026-64321)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:49 – Updated: 2026-07-25 08:49

Title

nvme: target: rdma: fix ndev refcount leak on queue connect

Summary

In the Linux kernel, the following vulnerability has been resolved: nvme: target: rdma: fix ndev refcount leak on queue connect nvmet_rdma_queue_connect() calls nvmet_rdma_find_get_device() which acquires a reference on the returned ndev via kref_get(). On the path where the host queue backlog is exceeded and the function returns NVME_SC_CONNECT_CTRL_BUSY, reference of ndev is not released, leaking the kref. Fix this by adding a goto to the existing put_device label before the early return.

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/d65fe42820b890a6a…
https://git.kernel.org/stable/c/a8803c4f0ac3fa7df…
https://git.kernel.org/stable/c/5828517d17eda27f2…
https://git.kernel.org/stable/c/badc53620fe813b3a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 31deaeb11ba7a885116c9c30892b9f763c04d59c , < d65fe42820b890a6a4644de0a95a812471f79ad3 (git) Affected: 31deaeb11ba7a885116c9c30892b9f763c04d59c , < a8803c4f0ac3fa7df5551bbb5a8800c434a94357 (git) Affected: 31deaeb11ba7a885116c9c30892b9f763c04d59c , < 5828517d17eda27f21d29ea14800c9e0a57bad11 (git) Affected: 31deaeb11ba7a885116c9c30892b9f763c04d59c , < badc53620fe813b3a9f727ef9526f98567c2c898 (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "programFiles": [
            "drivers/nvme/target/rdma.c"
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          "versions": [
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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          "versions": [
            {
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              "version": "0",
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              "status": "unaffected",
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            {
              "lessThanOrEqual": "7.1.*",
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              "version": "7.1.4",
              "versionType": "semver"
            },
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              "version": "7.2-rc1",
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      "cpeApplicability": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: target: rdma: fix ndev refcount leak on queue connect\n\nnvmet_rdma_queue_connect() calls nvmet_rdma_find_get_device() which\nacquires a reference on the returned ndev via kref_get(). On the path\nwhere the host queue backlog is exceeded and the function returns\nNVME_SC_CONNECT_CTRL_BUSY, reference of ndev is not released, leaking\nthe kref.\n\nFix this by adding a goto to the existing put_device label before the\nearly return."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:49:49.541Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
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          "url": "https://git.kernel.org/stable/c/a8803c4f0ac3fa7df5551bbb5a8800c434a94357"
        },
        {
          "url": "https://git.kernel.org/stable/c/5828517d17eda27f21d29ea14800c9e0a57bad11"
        },
        {
          "url": "https://git.kernel.org/stable/c/badc53620fe813b3a9f727ef9526f98567c2c898"
        }
      ],
      "title": "nvme: target: rdma: fix ndev refcount leak on queue connect",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64321",
    "datePublished": "2026-07-25T08:49:49.541Z",
    "dateReserved": "2026-07-19T15:36:31.780Z",
    "dateUpdated": "2026-07-25T08:49:49.541Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64321",
      "date": "2026-07-26",
      "epss": "0.00168",
      "percentile": "0.06415"
    },
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    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:45:46Z",
      "cve": "CVE-2026-64321",
      "id": "CVE-2026-64321",
      "initial_release_date": "2026-07-25T16:45:46Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64321",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64321.json",
      "version": "2"
    }
  }
}

GHSA-727C-MJRQ-H39G

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

nvme: target: rdma: fix ndev refcount leak on queue connect

nvmet_rdma_queue_connect() calls nvmet_rdma_find_get_device() which acquires a reference on the returned ndev via kref_get(). On the path where the host queue backlog is exceeded and the function returns NVME_SC_CONNECT_CTRL_BUSY, reference of ndev is not released, leaking the kref.

Fix this by adding a goto to the existing put_device label before the early return.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64321"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: target: rdma: fix ndev refcount leak on queue connect\n\nnvmet_rdma_queue_connect() calls nvmet_rdma_find_get_device() which\nacquires a reference on the returned ndev via kref_get(). On the path\nwhere the host queue backlog is exceeded and the function returns\nNVME_SC_CONNECT_CTRL_BUSY, reference of ndev is not released, leaking\nthe kref.\n\nFix this by adding a goto to the existing put_device label before the\nearly return.",
  "id": "GHSA-727c-mjrq-h39g",
  "modified": "2026-07-25T12:31:31Z",
  "published": "2026-07-25T12:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64321"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5828517d17eda27f21d29ea14800c9e0a57bad11"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8803c4f0ac3fa7df5551bbb5a8800c434a94357"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/badc53620fe813b3a9f727ef9526f98567c2c898"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d65fe42820b890a6a4644de0a95a812471f79ad3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64321 (GCVE-0-2026-64321)

GHSA-727C-MJRQ-H39G

Tags

Sightings

Nomenclature