CVE-2023-54174

kernel: vfio: Fix NULL pointer dereference caused by uninitialized group->iommufd

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · July 22, 2026

Description

A NULL pointer dereference was found in the VFIO subsystem. When a VFIO group operation fails before group->iommufd is initialized, the cleanup path calls iommufd_ctx_put() with a NULL pointer, causing a kernel crash.

Statement

This affects systems using VFIO with IOMMUFD. The crash occurs on error paths during VFIO group setup, requiring specific failure conditions to trigger. Virtualization hosts using VFIO for device passthrough are the primary 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-824 · Access of Uninitialized Pointer