CVE-2026-23261

About vulnerability

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. A memory leak was found in the Linux kernel’s NVMe over Fibre Channel (NVMe-FC) driver. In nvme_fc_init_ctrl(), when controller initialization fails after admin blk-mq resources are allocated, the fail_ctrl error path does not free the admin queue tagset. This causes blk-mq allocations to leak, as detected by kmemleak during blktests nvme/fc testing.

Live-patch status from KernelCare for each operating system.