nvme: add missing SRCU grace period in error path (CVE-2026-89972) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89972

nvme: add missing SRCU grace period in error path

Answer in brief

CVE-2026-89972 records a Unknown severity vulnerability in nvme: add missing SRCU grace period in error path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ed754e5deeb17f4e675c84e4b6c640cc7344e498 <d663944dbad81bb0e3635d7090db4713e6300858 \|\| >=ed754e5deeb17f4e675c84e4b6c640cc7344e498 <76023560d60f10b4f808941163aa2975f1631683 \|\| >=ed754e5deeb17f4e675c84e4b6c640cc7344e498 <ef248d5de4469fb6bbaf8dbe0c4c47800080d648	d663944dbad81bb0e3635d7090db4713e6300858, 76023560d60f10b4f808941163aa2975f1631683, ef248d5de4469fb6bbaf8dbe0c4c47800080d648
Linux/Linuxgeneric	4.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d663944dbad81bb0e3635d7090db4713e6300858 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.