{"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 < 0d4735418512ef825176726eaaa8bd6a35f6b46d","Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < d663944dbad81bb0e3635d7090db4713e6300858","Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 76023560d60f10b4f808941163aa2975f1631683","Linux >= ed754e5deeb17f4e675c84e4b6c640cc7344e498 < ef248d5de4469fb6bbaf8dbe0c4c47800080d648","Linux 4.15"],"published":"2026-09-16","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:45.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89972","references":[{"url":"https://git.kernel.org/stable/c/0d4735418512ef825176726eaaa8bd6a35f6b46d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89972.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89972"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535140"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89972"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89972"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89972.mbox"},{"url":"https://access.redhat.com/errata/RHSA-2026:75747"},{"url":"https://access.redhat.com/errata/RHSA-2026:75746"},{"url":"https://git.kernel.org/stable/c/3868476cd39161f18720582df17a1b621e805b5d"},{"url":"https://access.redhat.com/errata/RHSA-2026:76738"},{"url":"https://access.redhat.com/errata/RHSA-2026:76739"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00635,"epssPercentile":0.50213,"ingestedAt":"2026-09-16T10:53:53.956Z","patched":["enterprise_linux_baseos_v_8","enterprise_linux_crb_v_8","enterprise_linux_nfv_v_8","enterprise_linux_rt_v_8"],"cwe":["CWE-366"],"scores":{"nvd":9.8,"vendor":7.8,"cna":9.8},"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.\n\n## Vendor advisories\n\n- **RHSA-2026:75747** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:75747)\n- **RHSA-2026:75746** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-05 · [advisory](https://access.redhat.com/errata/RHSA-2026:75746)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89972.json)\n- **RHSA-2026:76738** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:76738)\n- **RHSA-2026:76739** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:76739)","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"}]}