---
id: CVE-2026-89852
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()

  The mbx_cmd_t is allocated on the stack but left uninitialized.
  qla2x00_mailbox_command() has severa…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()

  The mbx_cmd_t is allocated on the stack but left uninitialized.
  qla2x00_mailbox_command() has severa…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    f8fc5cc6b3284506c6ab83c822c48133377668bb
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    f29695b1138ae2539c5cd6cdaba9b1b072aaa81a
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    13d645a2cdb224d27205368f3e3c68bb160daf97
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    2f847f06bb223aa895eea91fc9e5e2d6314038eb
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    1f49e861c18caf8eef7f0ad9a2c5034f88a6ba79
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    e6cfb1ee18336aab41a0941d6d3ea5009aaafc05
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    9f31de4d07e4cde91dfc24522993a5fbb4d67083
  - >-
    Linux >= 4d4df1932b6b116aecc81039066fec27f2050762 <
    9efaa782845b4d5fb3e01242be0d06ebc7428d8f
  - Linux 2.6.26
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:16:52.900'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89852'
references:
  - url: 'https://git.kernel.org/stable/c/13d645a2cdb224d27205368f3e3c68bb160daf97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1f49e861c18caf8eef7f0ad9a2c5034f88a6ba79'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2f847f06bb223aa895eea91fc9e5e2d6314038eb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9efaa782845b4d5fb3e01242be0d06ebc7428d8f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9f31de4d07e4cde91dfc24522993a5fbb4d67083'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e6cfb1ee18336aab41a0941d6d3ea5009aaafc05'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f29695b1138ae2539c5cd6cdaba9b1b072aaa81a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f8fc5cc6b3284506c6ab83c822c48133377668bb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.993Z'
epss: 0.0021
epssPercentile: 0.10169
---

## Overview

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

scsi: qla2xxx: Zero mailbox struct in qla2x00_get_firmware_state()

The mbx_cmd_t is allocated on the stack but left uninitialized.
qla2x00_mailbox_command() has several early-return paths (PCI permanent
failure, device failed, EEH busy, ISP abort pending, mailbox access
timeout, purge mbox) that return without writing the input mailbox
registers back into mcp->mb[]. qla2x00_get_firmware_state() then
unconditionally copies mcp->mb[1..6] (and mb[12]) into the caller's
states[] array regardless of the return value.

On such a failure the copied values are uninitialized kernel stack
memory, which is then exposed to userspace via the fw_state and
mpi_fw_state sysfs handlers. Zero the mailbox struct so a failed query
yields deterministic zeroed state instead of leaking stack contents.

## Remediation

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