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CVE-2026-23261 (GCVE-0-2026-23261)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:41 – Updated: 2026-05-23 16:04
VLAI
Title
nvme-fc: release admin tagset if init fails
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5fe335a80548e2eda5d51fab801108b323600e95 , < 7c54d3f5ebbc5982daaa004260242dc07ac943ea (git)
Affected: 17c3a66d7ea2d303f783796d62f99e2e23b68c90 , < fa301aef50e3f3b5be6ee53457608beae5aa7a01 (git)
Affected: ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 , < e810b290922c535feb34bc90ab549446fe94d2a3 (git)
Affected: ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 , < d1877cc7270302081a315a81a0ee8331f19f95c8 (git)
Affected: 0d1840b2dd8fe073c020c39bf8e8e89488070801 (git)
Affected: 6.6.118 , < 6.6.124 (semver)
Affected: 6.12.60 , < 6.12.70 (semver)
Affected: 6.17.10 , < 6.18 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "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."
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        "id": "CVE-2026-23261",
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                "confidentialityImpact": "NONE",
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      "cve": "CVE-2026-23261",
      "id": "CVE-2026-23261",
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      "product_status:known_affected": "260",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: nvme-fc: release admin tagset if init fails",
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      "cve": "CVE-2026-23261",
      "id": "CVE-2026-23261",
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      "product_status:recommended": "244",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23261",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23261.json",
      "version": "10"
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  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.