What is CVE-2026-89972?

CVE-2026-89972 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 4.15 onward and patched in 6.12.112, 6.18.51, 7.2.5 and others. CVE-2026-89972 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-89972?

CVE-2026-89972 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-89972?

Yes, CVE-2026-89972 has been patched. Fixed versions include 6.12.112, 6.18.51, 7.2.5 and others. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-89972 actively exploited?

CVE-2026-89972 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-89972

Critical

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.

Package Linux Kernel

Published 2026-09-16

Last modified 2026-10-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 4.15 and later are affected. Fixed in 6.12.112, 6.18.51, 7.2.5, 7.3-rc2 and their respective stable series.

Affected from

≥ 4.15

Fixed in

✓ 6.12.112 6.12.x ✓ 6.18.51 6.18.x ✓ 7.2.5 7.2.x ✓ 7.3-rc2

References

4 total

Details

CVE ID CVE-2026-89972

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-09-16

Modified 2026-10-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-89972?

CVE-2026-89972 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 4.15 onward and has been patched in 6.12.112, 6.18.51, 7.2.5 and others. CVE-2026-89972 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-89972?

CVE-2026-89972 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-89972?

Yes. CVE-2026-89972 has been patched. Fixed versions include 6.12.112, 6.18.51, 7.2.5 and others. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-89972 actively exploited?

No. CVE-2026-89972 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.