---
id: CVE-2026-31768
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()

  Add a DMA-safe buffer and use it for spi_read() instead of a stack
  memory
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()

  Add a DMA-safe buffer and use it for spi_read() instead of a stack
  memory. All SPI buffers must be DMA-safe…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.9, < 6.1.168'
  - 'linux_kernel >= 6.2, < 6.6.134'
  - 'linux_kernel >= 6.7, < 6.12.81'
  - 'linux_kernel >= 6.13, < 6.18.22'
  - 'linux_kernel >= 6.19, < 6.19.12'
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.12
published: '2026-05-01'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:20.557'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31768'
references:
  - url: 'https://git.kernel.org/stable/c/014c6d27878d3883f7bb065610768fd021de1a96'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/67b3a91bdc48220bfb67155ab528121b9c822782'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/768461517a28d80fe81ea4d5d03a90cd184ea6ad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b3bb8faeca1a2ef7be95ee8a512b639f9ffce947'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d2d031b0786ea66ab0577c9d2d71435068d32199'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fa64aab25aba47296aa8d12bb4c88ec3fecb2054'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-082556.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31768.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-31768'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2464480'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-31768'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31768'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026050147-CVE-2026-31768-6fbc@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00131
epssPercentile: 0.02712
ingestedAt: '2026-09-08T15:33:26.989Z'
cwe:
  - CWE-120
---

## Overview

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

iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()

Add a DMA-safe buffer and use it for spi_read() instead of a stack
memory. All SPI buffers must be DMA-safe.

Since we only need up to 3 bytes, we just use a u8[] instead of __be16
and __be32 and change the conversion functions appropriately.

## Affected

- `linux_kernel >= 4.9, < 6.1.168`
- `linux_kernel >= 6.2, < 6.6.134`
- `linux_kernel >= 6.7, < 6.12.81`
- `linux_kernel >= 6.13, < 6.18.22`
- `linux_kernel >= 6.19, < 6.19.12`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.12`

## Vendor advisories

- **Red Hat VEX** · Low · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31768.json)