Vulnerability in Kernel: KVM: VMX: Disable preemption when probing user return MSRs
Summary
GSD-2021-1000190: KVM: VMX: Disable preemption when probing user return MSRs. Affects Kernel versions >= 4be5341026246870818e28b53202b001426a5aec, < e3ea1895df719c4ef87862501bb10d95f4177bed. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides essential functionality and acts as an interface between hardware and software. It manages system resources, facilitates communication between processes, and ensures security and stability. The Kernel is vulnerable to a specific issue related to the KVM (Kernel-based Virtual Machine) module, which is responsible for virtualization on the Linux platform.
Vulnerability Detail
The vulnerability arises from a lack of preemption disabling when probing user return MSRs (Model Specific Registers) in the KVM's VMX (Virtual Machine Extensions) module. This flaw can potentially be exploited by an attacker to gain unauthorized access to sensitive information or execute arbitrary code within a virtual machine. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround available for this vulnerability at the moment.
Conclusion
The vulnerability in the Kernel's KVM module poses a potential security risk, and it is crucial to update the Linux Kernel to the recommended version or later to mitigate this issue. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a crucial component of the Linux operating system that manages system resources, facilitates communication between processes, and ensures security and stability.
KVM (Kernel-based Virtual Machine) is a module in the Linux Kernel that enables virtualization on the Linux platform.
MSRs (Model Specific Registers) are special registers in the CPU that provide access to various hardware-specific settings and performance monitoring features.
VMX (Virtual Machine Extensions) are hardware extensions that enable efficient virtualization on Intel processors.
If successfully exploited, this vulnerability could allow an attacker to gain unauthorized access to sensitive information or execute arbitrary code within a virtual machine.
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