What is the severity of CVE-2021-47062?

CVE-2021-47062 has a moderate severity level related to the Linux kernel's virtualization handling.

Which versions of the Linux kernel are affected by CVE-2021-47062?

CVE-2021-47062 affects Linux kernel versions between 5.11 and 5.12, specifically up to 5.11.21 and 5.12.4.

How do I fix CVE-2021-47062?

To fix CVE-2021-47062, you should update your Linux kernel to the latest patched version available.

Is CVE-2021-47062 related to KVM virtualization?

Yes, CVE-2021-47062 involves a vulnerability in the KVM (Kernel-based Virtual Machine) implementation within the Linux kernel.

What impact does CVE-2021-47062 have on virtual machines?

CVE-2021-47062 could potentially affect the security of virtual machines by improperly managing vCPUs during encryption processes.

Vulnerability/
CVE-2021-47062

medium

5.5

CWE

476

29/2/2024

19/12/2024

CVE-2021-47062: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs

First published: Thu Feb 29 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs Use the kvm_for_each_vcpu() helper to iterate over vCPUs when encrypting VMSAs for SEV, which effectively switches to use online_vcpus instead of created_vcpus. This fixes a possible null-pointer dereference as created_vcpus does not guarantee a vCPU exists, since it is updated at the very beginning of KVM_CREATE_VCPU. created_vcpus exists to allow the bulk of vCPU creation to run in parallel, while still correctly restricting the max number of max vCPUs.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel	>=5.11<5.11.21
Linux Kernel	>=5.12<5.12.4

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47062?
CVE-2021-47062 has a moderate severity level related to the Linux kernel's virtualization handling.
Which versions of the Linux kernel are affected by CVE-2021-47062?
CVE-2021-47062 affects Linux kernel versions between 5.11 and 5.12, specifically up to 5.11.21 and 5.12.4.
How do I fix CVE-2021-47062?
To fix CVE-2021-47062, you should update your Linux kernel to the latest patched version available.
Is CVE-2021-47062 related to KVM virtualization?
Yes, CVE-2021-47062 involves a vulnerability in the KVM (Kernel-based Virtual Machine) implementation within the Linux kernel.
What impact does CVE-2021-47062 have on virtual machines?
CVE-2021-47062 could potentially affect the security of virtual machines by improperly managing vCPUs during encryption processes.

agent/title
agent/references
agent/description
agent/first-publish-date
agent/type
agent/author
agent/event
agent/remedy
agent/weakness
agent/severity
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/source
agent/tags
collector/nvd-api
source/NVD
agent/software-canonical-lookup
agent/software-canonical-lookup-request
vendor/linux
canonical/linux kernel
version/linux kernel/5.11
version/linux kernel/5.12

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.

Frequently Asked Questions

What is the severity of CVE-2021-47062?
CVE-2021-47062 has a moderate severity level related to the Linux kernel's virtualization handling.
Which versions of the Linux kernel are affected by CVE-2021-47062?
CVE-2021-47062 affects Linux kernel versions between 5.11 and 5.12, specifically up to 5.11.21 and 5.12.4.
How do I fix CVE-2021-47062?
To fix CVE-2021-47062, you should update your Linux kernel to the latest patched version available.
Is CVE-2021-47062 related to KVM virtualization?
Yes, CVE-2021-47062 involves a vulnerability in the KVM (Kernel-based Virtual Machine) implementation within the Linux kernel.
What impact does CVE-2021-47062 have on virtual machines?
CVE-2021-47062 could potentially affect the security of virtual machines by improperly managing vCPUs during encryption processes.

CVE-2021-47062: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs

Remedy

Remedy

Remedy

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47062?

Which versions of the Linux kernel are affected by CVE-2021-47062?

How do I fix CVE-2021-47062?

Is CVE-2021-47062 related to KVM virtualization?

What impact does CVE-2021-47062 have on virtual machines?

Company

Resources

Contact

Frequently Asked Questions

What is the severity of CVE-2021-47062?

Which versions of the Linux kernel are affected by CVE-2021-47062?

How do I fix CVE-2021-47062?

Is CVE-2021-47062 related to KVM virtualization?

What impact does CVE-2021-47062 have on virtual machines?