Medium 5.5Published Mar 18, 2026

CVE-2026-23261nvme-fc: release admin tagset if init fails

Updated under an hour ago (Oct 27, 2026, 2:30 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5fe335a80548e2eda5d51fab801108b323600e95 before 7c54d3f5ebbc5982daaa004260242dc07ac943ea; from 17c3a66d7ea2d303f783796d62f99e2e23b68c90 before fa301aef50e3f3b5be6ee53457608beae5aa7a01; from ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 before e810b290922c535feb34bc90ab549446fe94d2a3; from ea3442efabd0aa3930c5bab73c3901ef38ef6ac3 before d1877cc7270302081a315a81a0ee8331f19f95c8; 0d1840b2dd8fe073c020c39bf8e8e89488070801; from 6.6.118 before 6.6.124; from 6.12.60 before 6.12.70; from 6.17.10 before 6.18	CNA record
linux linux_kernel linux:linux_kernel	from 6.6.118 before 6.6.124; from 6.12.60 before 6.12.70; from 6.17.10 before 6.18; from 6.18.1 before 6.18.10; 6.18; 6.18; 6.19; 6.19; and 5 more ranges	NVD

References

References

https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943ea	patch
https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01	patch
https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3	patch
https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.