CVE Database›Document archive›CVE-2021-43056

CVE-2021-43056

kernel: ppc: kvm: allows a malicious KVM guest to crash the host

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 25, 2021

Updated · November 22, 2025

Description

A denial of service problem was found in the Linux kernel's Kernel-based Virtual Machine (KVM) specific to PowerPC. In this flaw, a user with local access can confuse the host offline code, causing the guest to crash.

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

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

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-252 · Unchecked Return Value