---
id: CVE-2026-93782
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vhost-scsi: flush backend after device ioctls

  vhost-scsi translates guest response descriptors into userspace iovecs
  when commands are submitted
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vhost-scsi: flush backend after device ioctls

  vhost-scsi translates guest response descriptors into userspace iovecs
  when commands are submitted.  Target-core complete…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    981c97d09c6b9560bb12dcc41f11ce59b1a48e97
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    6c1b802e36b05ebd9d41686c4dce6f06966af469
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    22598f55a4c2b510b3df5e69e563387a963222ae
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:18.713'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93782'
references:
  - url: 'https://git.kernel.org/stable/c/22598f55a4c2b510b3df5e69e563387a963222ae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6c1b802e36b05ebd9d41686c4dce6f06966af469'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/981c97d09c6b9560bb12dcc41f11ce59b1a48e97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.904Z'
epss: 0.0012
epssPercentile: 0.01626
---

## Overview

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

vhost-scsi: flush backend after device ioctls

vhost-scsi translates guest response descriptors into userspace iovecs
when commands are submitted.  Target-core completes those commands
asynchronously, so VHOST_SET_MEM_TABLE can replace the memory table while
an in-flight command still retains response iovecs translated through the
old table.

If the old mapping is reused after VHOST_SET_MEM_TABLE returns, command
completion can write the response to an unrelated userspace object.

Flush the vhost-scsi backend after vhost_dev_ioctl() handles a device
ioctl.  This waits for in-flight commands that can still use the old
response iovecs before the ioctl returns.

## Remediation

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