---
id: CVE-2025-68324
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: imm: Fix use-after-free bug caused by unfinished delayed work

  The delayed work item 'imm_tq' is initialized in imm_attach() and
  scheduled via imm_queuecommand() …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  scsi: imm: Fix use-after-free bug caused by unfinished delayed work

  The delayed work item 'imm_tq' is initialized in imm_attach() and
  scheduled via imm_queuecommand() …
severity: none
published: '2025-12-18'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T11:10:00.203'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68324'
references:
  - url: 'https://git.kernel.org/stable/c/31ab2aad7a7b7501e904a09bf361e44671f66092'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/48dd41fa2d6c6a0c50e714deeba06ffe7f91961b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e434426cc23ad5e2aad649327b59aea00294b13'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ab58153ec64fa3fc9aea09ca09dc9322e0b54a7c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00187
epssPercentile: 0.07664
ingestedAt: '2026-10-13T11:23:51.133Z'
---

## Overview

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

scsi: imm: Fix use-after-free bug caused by unfinished delayed work

The delayed work item 'imm_tq' is initialized in imm_attach() and
scheduled via imm_queuecommand() for processing SCSI commands.  When the
IMM parallel port SCSI host adapter is detached through imm_detach(),
the imm_struct device instance is deallocated.

However, the delayed work might still be pending or executing
when imm_detach() is called, leading to use-after-free bugs
when the work function imm_interrupt() accesses the already
freed imm_struct memory.

The race condition can occur as follows:

CPU 0(detach thread)   | CPU 1
                       | imm_queuecommand()
                       |   imm_queuecommand_lck()
imm_detach()           |     schedule_delayed_work()
  kfree(dev) //FREE    | imm_interrupt()
                       |   dev = container_of(...) //USE
                           dev-> //USE

Add disable_delayed_work_sync() in imm_detach() to guarantee proper
cancellation of the delayed work item before imm_struct is deallocated.

## Remediation

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