CVE-2026-89972
CRITICAL
INFO
Priority: 0.06
BB Relevance:
80/100
Published: 2026-09-16
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
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.
Affected Software (9)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 037e71058e8a59568db72015d4386f54e54dff77 |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 7f180cef9f3421ece85c43bfdc326ce5875845bb |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < da710ec2a70a85de73afd4f7869b234fd9ede49e |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 3868476cd39161f18720582df17a1b621e805b5d |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 0d4735418512ef825176726eaaa8bd6a35f6b46d |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < d663944dbad81bb0e3635d7090db4713e6300858 |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < 76023560d60f10b4f808941163aa2975f1631683 |
| Linux | Linux | ed754e5deeb17f4e675c84e4b6c640cc7344e498 < ef248d5de4469fb6bbaf8dbe0c4c47800080d648 |
| Linux | Linux | 4.15 |