---
id: CVE-2026-64221
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: ti-qspi: fix use-after-free after DMA setup failure

  The driver falls back to PIO mode if DMA setup fails during probe.

  Make sure to clear the DMA channel pointer…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: ti-qspi: fix use-after-free after DMA setup failure

  The driver falls back to PIO mode if DMA setup fails during probe.

  Make sure to clear the DMA channel pointer…
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'
published: '2026-07-24'
updated: '2026-07-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64221'
references:
  - url: 'https://git.kernel.org/stable/c/178b9b570c0f75fa7e691490520328b20d19138e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1cd927002120678bd5d23c760246639caa53040e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3bbbe7ae3fdada0df4157c1ffe989f92dfa8dcd6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c6f306a8140962c7284197db54b96fdb5f468d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d6f422b122922d1abee907d673bcc990e5f3672d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d7a076fb596c7b408ed6df74793a597990a6d860'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ea6ec3343e05f7937a53eb6d7617b3abdb4abc19'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f2dc841d7dc9063fe9b47ced869b1271e55052ae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64221.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64221'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2506812'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64221'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64221'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026072416-CVE-2026-64221-299d@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00126
epssPercentile: 0.02276
ingestedAt: '2026-07-27T06:16:49.162Z'
vendor: Red Hat
cwe:
  - CWE-825
scores:
  nvd: 7.8
  vendor: 7
---

## Overview

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

spi: ti-qspi: fix use-after-free after DMA setup failure

The driver falls back to PIO mode if DMA setup fails during probe.

Make sure to clear the DMA channel pointer also if buffer allocation
fails to avoid passing a pointer to the released channel to the DMA
engine (or trying to free the channel a second time on late probe errors
or driver unbind).

This issue was flagged by Sashiko when reviewing a devres allocation
conversion patch.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64221.json)