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CVE-2026-93040

kernel: dmaengine: dw-edma: Serialize channel state checks

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 20, 2026

Description

A flaw was found in the Linux kernel's dmaengine: dw-edma component. A race condition exists where the pause() and resume() functions can access and modify the channel state without proper synchronization, while interrupt handlers update the same state under a lock. This inconsistency can lead to a channel becoming unresponsive, effectively causing a denial of service. A local attacker could potentially exploit this to render the affected Direct Memory Access (DMA) channel unusable.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition