---
id: CVE-2026-93040
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: dw-edma: Serialize channel state checks

  pause() and resume() read and update channel state without holding vc.lock,
  while the interrupt handlers update the …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  dmaengine: dw-edma: Serialize channel state checks

  pause() and resume() read and update channel state without holding vc.lock,
  while the interrupt handlers update the …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    be0072af8ce6e9458cc586e0e8b41a251e7d4316
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    2d76b91deeab973dd8a8c2ee587ce27f881de768
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    3001cfcee30dcc81f8b3774319c12067f126e49a
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    b6293a8a38f4d5866ce1a264c138265a02e4c53a
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    da16a02f0998a0d455ce6265b836b29ad92e6e58
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    fe0ffa0190e862ed71e8c1a476090f648c9cb7d9
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    6fc436e1500c5e4f0dde2a3dbadf6d898057be8f
  - >-
    Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf <
    f7d1619f3e10c619b62c6cd6d95371b5c526c85a
  - Linux 5.3
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:57.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93040'
references:
  - url: 'https://git.kernel.org/stable/c/2d76b91deeab973dd8a8c2ee587ce27f881de768'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3001cfcee30dcc81f8b3774319c12067f126e49a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6fc436e1500c5e4f0dde2a3dbadf6d898057be8f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b6293a8a38f4d5866ce1a264c138265a02e4c53a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be0072af8ce6e9458cc586e0e8b41a251e7d4316'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da16a02f0998a0d455ce6265b836b29ad92e6e58'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f7d1619f3e10c619b62c6cd6d95371b5c526c85a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fe0ffa0190e862ed71e8c1a476090f648c9cb7d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.774Z'
epss: 0.00177
epssPercentile: 0.07481
---

## Overview

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

dmaengine: dw-edma: Serialize channel state checks

pause() and resume() read and update channel state without holding vc.lock,
while the interrupt handlers update the same state under it. Take the same
lock around those state checks so that request, status, and configured stay
consistent.

For example, pause() can observe EDMA_ST_BUSY right before the interrupt
handler completes the final descriptor and moves the channel to
EDMA_ST_IDLE, and then record EDMA_REQ_PAUSE on an already idle channel. No
further interrupt will acknowledge the request, and since issue_pending()
requires EDMA_REQ_NONE, the channel is wedged for good: terminate_all()
leaves the stale request behind, so even reconfiguring the channel does not
recover it.

issue_pending() already runs under vc.lock, but it tests configured before
taking it. Move that test under the lock as well, so configured, request,
and status are evaluated as one channel-state snapshot.

## Remediation

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