---
id: CVE-2026-74703
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vhost-scsi: Validate T10 PI scatterlist counts

  When T10 PI is negotiated, vhost-scsi splits protection bytes from
  the data iterator before mapping the request scatterl…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vhost-scsi: Validate T10 PI scatterlist counts

  When T10 PI is negotiated, vhost-scsi splits protection bytes from
  the data iterator before mapping the request scatterl…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74703'
references:
  - url: 'https://git.kernel.org/stable/c/2417a498cf3fe64d06faf87e236eda98dd4f04e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d876c493fc4b811941bfeb4c80beb2dfc4bf025e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f8fe3f8d342da750dd10361bf66009fd3072926b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00184
epssPercentile: 0.07373
ingestedAt: '2026-10-14T13:30:58.542Z'
---

## Overview

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

vhost-scsi: Validate T10 PI scatterlist counts

When T10 PI is negotiated, vhost-scsi splits protection bytes from
the data iterator before mapping the request scatterlists. A malformed
request can claim protection bytes that cover or exceed the full payload
length. The former leaves no data bytes to map, while the latter
underflows exp_data_len before advancing the iterator. Both cases can let
a zero data SGL count reach sg_alloc_table_chained(), which triggers
BUG_ON(!nents).

Reject protection lengths that cover or exceed the payload before
subtracting prot_bytes and advancing the iterator. Also propagate
negative errors from the protection SGL calculation before calling the
allocator, matching the data SGL path.

## Remediation

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