← Back to the live CVE advisory feed

CVE-2026-89972: Linux

Severity

9.8 (CRITICAL)

Vendor

LINUX

Affected versions

ed754e5deeb17f4e675c84e4b6c640cc7344e498 through before d663944dbad81bb0e3635d7090db4713e6300858; ed754e5deeb17f4e675c84

Patch status

Patched

Published

2026-09-16T11:17:07.953

Modified

2026-09-16T15:18:21.637

Why it matters

Critical vulnerability requiring immediate validation against your environment.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Compare installed versions against the affected version range in the advisory.

Technical summary

In the Linux kernel, the following vulnerability has been resolved: nvme: add missing SRCU grace period in error path nvme_alloc_ns() error path at out_unlink_ns removes ns from the namespace head siblings list with list_del_rcu(&ns->siblings) but does not wait for SRCU readers before freeing the namespace struct. Multipath code iterates the head->list under srcu_read_lock() in nvme_find_path() and nvme_mpath_revalidate_paths(), so a concurrent reader can still hold a reference to ns when kfree(ns) runs. The normal removal path in nvme_ns_remove() correctly calls synchronize_srcu(&ns->head->srcu) after list_del_rcu() to wait for in-progress readers. Add the same grace period in the error path.

View the official NVD record for CVE-2026-89972

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.