CVE-2026-93168

kernel: dmaengine: xilinx_dma: Fix CPU stall in xilinx_dma_poll_timeout

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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: xilinx_dma component. When the xilinx_dma_poll_timeout function is called with a zero-value delay and an unfulfilled condition, the CPU can enter a prolonged busy-wait state. This occurs due to an underestimation of wall clock time, causing the system to stall for several minutes. This vulnerability can lead to a Denial of Service (DoS) condition.

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-835 · Loop with Unreachable Exit Condition ('Infinite Loop')