CVE-2025-40219

kernel: Linux kernel: Denial of Service due to race condition in SR-IOV device management

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 4, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel's handling of Single Root I/O Virtualization (SR-IOV) devices. A missing locking mechanism during the enabling or disabling of SR-IOV can create a race condition when virtual devices are added or removed. This vulnerability may allow a local attacker to cause a double removal of Peripheral Component Interconnect (PCI) devices, leading to data corruption and potential system instability or a Denial of Service (DoS) on affected systems.

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