CVE-2026-23261

MEDIUM EPSS 1.7%
Published Mar 18, 20263mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 18, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
1.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥6.6.118  –  <6.6.124
linuxlinux_kernel*≥6.12.60  –  <6.12.70
linuxlinux_kernel*≥6.17.10  –  <6.18
linuxlinux_kernel*≥6.18.1  –  <6.18.10
linuxlinux_kernel6.18any
linuxlinux_kernel6.18any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 4

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

Remediation

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