CVE-2021-47112

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

15/03/2024

Last modified:

13/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features (Async PF, PV EOI, steal time) work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to make sure hypervisor doesn&#39;t write to stale locations after we jump to the previously hibernated kernel (which can try to place anything there). For secondary CPUs the job is already done by kvm_cpu_down_prepare(), register syscore ops to do the same for boot CPU.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		5.4.125 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.43 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.10 (excluding)
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47112

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools