CVE-2026-23261
Full vulnerability record from the local CVENow database.
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.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-03-18 18:16:24.623000
Last modified
2026-11-05 22:18:10.313000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-03-18T18:16:24.623",
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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 -> nvmf_create_ctrl()\n -> nvme_fc_create_ctrl()\n -> 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->ctrl.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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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvme-fc: liberar el conjunto de etiquetas de administración si la inicialización falla\n\nnvme_fabrics crea un controlador NVMe/FC en la siguiente ruta:\n\n nvmf_dev_write()\n -> nvmf_create_ctrl()\n -> nvme_fc_create_ctrl()\n -> nvme_fc_init_ctrl()\n\nnvme_fc_init_ctrl() asigna los recursos blk-mq de administración justo después de que nvme_add_ctrl() tenga éxito. Si alguno de los pasos subsiguientes falla (cambiar el estado del controlador, programar el trabajo de conexión, etc.), saltamos a la ruta fail_ctrl, que desmantela las referencias del controlador pero nunca libera la cola/conjunto de etiquetas de administración. Las asignaciones blk-mq filtradas coinciden con el informe kmemleak visto durante blktests nvme/fc.\n\nVerificar ctrl->ctrl.admin_tagset en la ruta fail_ctrl y llamar a nvme_remove_admin_tag_set() cuando esté establecido para que todas las asignaciones de la cola de administración sean recuperadas cada vez que la configuración del controlador se aborte."
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