Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6.118, < 6.6.124 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/7c54d3f5ebbc5982daaa004260242dc07ac943eaPatch
- https://git.kernel.org/stable/c/d1877cc7270302081a315a81a0ee8331f19f95c8Patch
- https://git.kernel.org/stable/c/e810b290922c535feb34bc90ab549446fe94d2a3Patch
- https://git.kernel.org/stable/c/fa301aef50e3f3b5be6ee53457608beae5aa7a01Patch
FAQ
What is CVE-2026-23261?
CVE-2026-23261 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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() ...
How severe is CVE-2026-23261?
CVE-2026-23261 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23261?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.