{"id":"CVE-2026-89972","summary":"nvme: add missing SRCU grace period in error path","details":"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-\u003esiblings) but\ndoes not wait for SRCU readers before freeing the namespace struct.\nMultipath code iterates the head-\u003elist 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-\u003ehead-\u003esrcu) after list_del_rcu() to wait for\nin-progress readers. Add the same grace period in the error path.","modified":"2026-09-18T03:48:34.517888040Z","published":"2026-09-16T10:32:51.701Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89972.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/76023560d60f10b4f808941163aa2975f1631683"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d663944dbad81bb0e3635d7090db4713e6300858"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef248d5de4469fb6bbaf8dbe0c4c47800080d648"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89972.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89972"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ed754e5deeb17f4e675c84e4b6c640cc7344e498"},{"fixed":"d663944dbad81bb0e3635d7090db4713e6300858"},{"fixed":"76023560d60f10b4f808941163aa2975f1631683"},{"fixed":"ef248d5de4469fb6bbaf8dbe0c4c47800080d648"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89972.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89972.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}