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CVE-2026-64473

kernel: vfio: Remove device debugfs before releasing devres

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 25, 2026

Updated · October 29, 2026

Description

A flaw was found in the VFIO (Virtual Function I/O) subsystem of the Linux kernel. During device unregistration, debugfs (a diagnostic filesystem) entries might remain visible with outdated or "stale" data after the associated resources have been released. This occurs because the debugfs entries are not removed before the device resources are deallocated. While primarily affecting diagnostic views, this could lead to an attacker observing incorrect system state.

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 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-911 · Improper Update of Reference Count