---
id: CVE-2026-64303
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

  When dmaengine_prep_slave_sg() fails for the TX channel, the error path
  terminates the TX DMA chann…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

  When dmaengine_prep_slave_sg() fails for the TX channel, the error path
  terminates the TX DMA chann…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
published: '2026-07-25'
updated: '2026-07-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64303'
references:
  - url: 'https://git.kernel.org/stable/c/01980b5da56e573d62798d0ff6c86bcaa2b22cbe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/808033d80d5c9f8adf7e8de9317389270ce13430'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9d000bdd250d649a11cd7f733175686877344582'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ad370d1c7a9a832f77b2341513cd31188c9443af'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af39a2698f69b584d14a00cffe0f51a2caa15337'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cce2063404b2341e7b2bbf85eddfcd70a31a0033'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d5c1060218a3749c8a18b36f8169d910fce20639'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e65505d91fa036a238968e4c10744244d1b968c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00694
epssPercentile: 0.51537
ingestedAt: '2026-07-27T06:16:50.271Z'
---

## Overview

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

spi: fsl-lpspi: terminate the RX channel on TX prepare failure path

When dmaengine_prep_slave_sg() fails for the TX channel, the error path
terminates the TX DMA channel but leaves the RX channel running. Since
the RX channel was already submitted and issued prior to preparing
the TX descriptor, returning -EINVAL causes the SPI core to unmap the
DMA buffers while the RX DMA engine continues writing to them, leading
to potential memory corruption or use-after-free.

Terminate the RX channel before returning on the TX prepare failure path.

## Remediation

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