---
id: CVE-2026-89848
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Quiesce response IRQ before freeing request queue

  qla2xxx_delete_qpair() deletes the request queue before the response
  queue
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Quiesce response IRQ before freeing request queue

  qla2xxx_delete_qpair() deletes the request queue before the response
  queue. qla25xx_delete_req_que() f…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d74595278f4ab192af66d9e60a9087464638beee <
    7ac5be2a8609679fc6bbfea881360444a5ce8202
  - >-
    Linux >= d74595278f4ab192af66d9e60a9087464638beee <
    1486cc18be3e2b4c2a730f4a1b0448d009381b3d
  - >-
    Linux >= d74595278f4ab192af66d9e60a9087464638beee <
    10e9f05f7fd0a103886a867ec8afe621fe4b906a
  - >-
    Linux >= d74595278f4ab192af66d9e60a9087464638beee <
    157ca7d1af45f87aa14a286754f19c3f72386988
  - >-
    Linux >= d74595278f4ab192af66d9e60a9087464638beee <
    505753ec2594c6af09a601f0dd60be7d840c1d2d
  - Linux 4.10
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:13.107'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89848'
references:
  - url: 'https://git.kernel.org/stable/c/10e9f05f7fd0a103886a867ec8afe621fe4b906a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1486cc18be3e2b4c2a730f4a1b0448d009381b3d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/157ca7d1af45f87aa14a286754f19c3f72386988'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/505753ec2594c6af09a601f0dd60be7d840c1d2d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7ac5be2a8609679fc6bbfea881360444a5ce8202'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.994Z'
epss: 0.00552
epssPercentile: 0.43778
---

## Overview

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

scsi: qla2xxx: Quiesce response IRQ before freeing request queue

qla2xxx_delete_qpair() deletes the request queue before the response
queue. qla25xx_delete_req_que() frees the request queue memory
(kfree(req) in qla25xx_free_req_que()), but the response-queue MSI-X is
only released later, in qla25xx_free_rsp_que(). In that window the
response interrupt can still fire, qla2xxx_msix_rsp_q() queues
qpair->q_work, and qla_do_work() -> qla24xx_process_response_queue()
dereferences the now-freed rsp->req (LOGINOUT/CT/ELS entries and the
status path), a use-after-free.

The cancel_work_sync() added for the qpair teardown lives in the
response free path, which runs after the request queue is already freed,
so it does not protect rsp->req.

Release the response-queue interrupt and flush qpair->q_work before
deleting the request queue, so no late completion can reach the freed
request queue. Clearing have_irq makes the subsequent
qla25xx_free_rsp_que() skip its free_irq(), and the firmware
queue-delete order (request then response) is preserved; the
request-delete mailbox completes on the default vector and is unaffected
by dropping the qpair response interrupt early.

## Remediation

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