{"id":"CVE-2026-89972","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->s…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->s…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < d663944dbad81bb0e3635d7090db4713e6300858","Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 76023560d60f10b4f808941163aa2975f1631683","Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < ef248d5de4469fb6bbaf8dbe0c4c47800080d648","Linux 4.15"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:21.637","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89972","references":[{"url":"https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.956Z","epss":0.00598,"epssPercentile":0.47024,"slug":"CVE-2026-89972","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnvme: add missing SRCU grace period in error path\n\nnvme_alloc_ns() error path at out_unlink_ns removes ns from the\nnamespace head siblings list with list_del_rcu(&ns->siblings) but\ndoes not wait for SRCU readers before freeing the namespace struct.\nMultipath code iterates the head->list under srcu_read_lock() in\nnvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent\nreader can still hold a reference to ns when kfree(ns) runs.\n\nThe normal removal path in nvme_ns_remove() correctly calls\nsynchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for\nin-progress readers. Add the same grace period in the error path.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":205063,"id":"CVE-2026-89972","ts":1789570705009,"field":"cvss","old":null,"new":"9.8"},{"seq":205062,"id":"CVE-2026-89972","ts":1789570705009,"field":"severity","old":"none","new":"critical"}]}