---
id: CVE-2026-93170
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA
  interrupt handlers


  Fix a race condition in AXIDMA and MCDMA irq handlers where the channel…
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA
  interrupt handlers


  Fix a race condition in AXIDMA and MCDMA irq handlers where the channel…
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
affected:
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    7f4b989d7d87381927b98d64492f8dcf979f57ab
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    5459e02707b27a964ae72e028d3ff72a3b687c4a
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    425630e9eea1f9f8912b8c6abf01e0dab1e27917
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    fdaf297ab275c6efecac5e87669c31bc89b74297
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    c27d16fd2358b2fc3e1ffaca03afd11dc28630ea
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    ec927657524be4438447944a58173c7baf7f2384
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    c3e943490ced0b9ad475844eda7661f6a9bcfb4a
  - >-
    Linux >= c0bba3a99f0709c24c2c7ada7cb098966b1d791f <
    0b6d055edb55ecadadf54e930c2b4fab76fa9a5a
  - Linux 4.7
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:23.360'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93170'
references:
  - url: 'https://git.kernel.org/stable/c/0b6d055edb55ecadadf54e930c2b4fab76fa9a5a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/425630e9eea1f9f8912b8c6abf01e0dab1e27917'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5459e02707b27a964ae72e028d3ff72a3b687c4a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7f4b989d7d87381927b98d64492f8dcf979f57ab'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c27d16fd2358b2fc3e1ffaca03afd11dc28630ea'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c3e943490ced0b9ad475844eda7661f6a9bcfb4a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ec927657524be4438447944a58173c7baf7f2384'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fdaf297ab275c6efecac5e87669c31bc89b74297'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00176
epssPercentile: 0.06255
ingestedAt: '2026-09-17T16:21:47.732Z'
---

## Overview

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

dmaengine: xilinx_dma: Fix channel idle state management in AXIDMA and MCDMA interrupt handlers

Fix a race condition in AXIDMA and MCDMA irq handlers where the channel
could be incorrectly marked as idle and attempt spurious transfers when
descriptors are still being processed.

The issue occurs when:
1. Multiple descriptors are queued and active.
2. An interrupt fires after completing some descriptors.
3. xilinx_dma_complete_descriptor() moves completed descriptors to
done_list.
4. Channel is marked idle and start_transfer() is called even though
   active_list still contains unprocessed descriptors.
5. This leads to premature transfer attempts and potential descriptor
   corruption or missed completions.

Only mark the channel as idle and start new transfers when the active list
is actually empty, ensuring proper channel state management and avoiding
spurious transfer attempts.

## Remediation

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