---
id: CVE-2026-89845
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()

  qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL
  check and again when assign…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()

  qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL
  check and again when assign…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    c845f2597787ef70159a32566669e308b2807a56
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    fe04b31e386aee4cc3a18f07462af146037dc389
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    1b995cf4157465357d66ba096e7cdaafab9972e7
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    d79376fbd2a076de82c1cd8aa0b600b300c75a44
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    1c90b74e484ba48f31944fe04963d99e01ac3767
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    5dd9bec8004ba93cee8b689bf54ce294f59e5e3c
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    35124cfa9898b2088ee72859e573e0876aff66fc
  - >-
    Linux >= a6fe35c052c4fdd1e8e21251f14eea0bd4bbd25b <
    deb8abde83a799d2501f3977f6d6051000253f5e
  - Linux 3.4
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:16:51.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89845'
references:
  - url: 'https://git.kernel.org/stable/c/1b995cf4157465357d66ba096e7cdaafab9972e7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1c90b74e484ba48f31944fe04963d99e01ac3767'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/35124cfa9898b2088ee72859e573e0876aff66fc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5dd9bec8004ba93cee8b689bf54ce294f59e5e3c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c845f2597787ef70159a32566669e308b2807a56'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d79376fbd2a076de82c1cd8aa0b600b300c75a44'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/deb8abde83a799d2501f3977f6d6051000253f5e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fe04b31e386aee4cc3a18f07462af146037dc389'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.996Z'
epss: 0.00211
epssPercentile: 0.11599
---

## Overview

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

scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()

qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL
check and again when assigning it to req. The map slot is cleared by
qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock)
during queue teardown, while the response-queue interrupt that drives
qla2x00_error_entry() is still registered (the IRQ is released later in
qla25xx_free_rsp_que()). If the slot is set to NULL between the two
reads, req becomes NULL and is dereferenced.

Read the slot once into req and NULL-check the local before use. mq_lock
is a mutex and cannot be taken from interrupt context, so the single
read plus local check is the appropriate fix for the reported NULL
dereference.

## Remediation

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