CVE-2021-47061

kernel: KVM: use-after-free while destroy I/O bus devices on unregister failure

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Severity

Moderate

Red Hat Product Security

6.7

CVSS 3.1

Review impact separately from score.

Published · February 29, 2024

Updated · August 5, 2026

Description

A flaw was found in the Linux kernel’s Kernel-based virtual machine (KVM) subsystem. A bug in the code destroys devices attached to I/O buses before the bus can be nullified. This issue causes use-after-free scenarios as readers may still reference the devices on their bus version.

Statement

Red Hat Enterprise Linux 8 and 9 are not affected by this vulnerability.

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 · 6.7
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free