---
id: CVE-2026-89970
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet-auth: Synchronize timeout work during SQ teardown

  nvmet_auth_sq_free() cancels auth_expired_work with
  cancel_delayed_work()
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet-auth: Synchronize timeout work during SQ teardown

  nvmet_auth_sq_free() cancels auth_expired_work with
  cancel_delayed_work(). If the work has already started, can…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    664022fa1c93f4eba09ef5ee02411b9709dd7a93
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    c3c126a6142a1335bc8c34a5607c39cf01daf295
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    c17c87bde6d6f5252a6a6f0a94b2430164aa28d5
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    7555ddd60af72df2862dd8f9b730a9848577edda
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    eb4f9127a2b8a152743f1ee597627e2f69cb54fe
  - >-
    Linux >= 1a70200f404ae210b4f0334e3936e84f8edb6bc8 <
    eaa948c0e19b1bb2d93262207bca0c3d19cc3406
  - Linux 6.0
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:21.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89970'
references:
  - url: 'https://git.kernel.org/stable/c/664022fa1c93f4eba09ef5ee02411b9709dd7a93'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7555ddd60af72df2862dd8f9b730a9848577edda'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c17c87bde6d6f5252a6a6f0a94b2430164aa28d5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c3c126a6142a1335bc8c34a5607c39cf01daf295'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eaa948c0e19b1bb2d93262207bca0c3d19cc3406'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/eb4f9127a2b8a152743f1ee597627e2f69cb54fe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.956Z'
epss: 0.00782
epssPercentile: 0.54517
---

## Overview

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

nvmet-auth: Synchronize timeout work during SQ teardown

nvmet_auth_sq_free() cancels auth_expired_work with
cancel_delayed_work(). If the work has already started, cancellation does
not wait for the callback. Transport teardown can consequently free or
reuse the queue containing struct nvmet_sq while
nvmet_auth_expired_work() still accesses that SQ.

Add a teardown-specific helper that synchronously drains the delayed work
before freeing authentication state, and use it from nvmet_sq_destroy().
Keep the non-synchronous helper for in-band authentication state cleanup,
where the SQ owner remains alive.

## Remediation

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