---
id: CVE-2026-90228
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()

  When a host issues an Identify command with CNS 05h (I/O Command Set
  specific Identify Namespace…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()

  When a host issues an Identify command with CNS 05h (I/O Command Set
  specific Identify Namespace…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    1ce8faf90eb0bf5599b90db38500aefea9426485
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    b873099944dae5702b4b6db6814d1f1e8d4cfb00
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    ff28a93a895912010a7827a0e1445ebe8be53b4d
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    cc29f7082b7ab5e0337f27d1fef16359f05fcffa
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    1fb1236312ee1a600de6b3ca560f0b3fd5a50471
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    0b4cf43f9ca7118590a338de900edbd6047cd89f
  - >-
    Linux >= aaf2e048af2704da5869f27b508b288f36d5c7b7 <
    f594863967d87b7fcbff6e724d51135fd701a13d
  - Linux 5.14
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:47.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90228'
references:
  - url: 'https://git.kernel.org/stable/c/0b4cf43f9ca7118590a338de900edbd6047cd89f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1ce8faf90eb0bf5599b90db38500aefea9426485'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1fb1236312ee1a600de6b3ca560f0b3fd5a50471'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b873099944dae5702b4b6db6814d1f1e8d4cfb00'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cc29f7082b7ab5e0337f27d1fef16359f05fcffa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f594863967d87b7fcbff6e724d51135fd701a13d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ff28a93a895912010a7827a0e1445ebe8be53b4d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.007
epssPercentile: 0.51068
ingestedAt: '2026-09-17T16:21:47.853Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()

When a host issues an Identify command with CNS 05h (I/O Command Set
specific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed
namespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on
req->ns->bdev. A file-backed namespace has no block device, so
req->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing.

The I/O command set is selected by the host-supplied CSI field and the
command is routed here whenever CONFIG_BLK_DEV_ZONED is enabled,
independent of the namespace backing type, so any file-backed namespace
is exposed.

Reject the command with Invalid Field when the namespace is not backed
by a block device.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.