KVM: VMX: Always clear vmx->fail on emulation_required
Summary
GSD-2021-1002835: KVM: VMX: Always clear vmx->fail on emulation_required. Affects Kernel versions >= c8607e4a086fae05efe5bffb47c5199c65e7216e, < e4e4e7cb229821cd215031abc47efdab5486a67c. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and processes. The Kernel package is responsible for managing system resources, including memory, input/output devices, and scheduling tasks. It is a fundamental component that enables the execution of user applications and ensures the stability and security of the operating system.
Vulnerability Detail
The vulnerability identified as GSD-2021-1002835 affects the Kernel package in the Linux ecosystem. Specifically, it impacts the KVM (Kernel-based Virtual Machine) module, more specifically the VMX (Virtual Machine Extensions) subsystem. The vulnerability arises from a failure to clear the 'vmx->fail' flag on emulation_required. This flaw could potentially be exploited by an attacker with elevated privileges within a virtual machine to execute arbitrary code on the host system or escalate privileges. 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
No workaround has been provided for this vulnerability.
Conclusion
The vulnerability identified as GSD-2021-1002835 in the Kernel package's KVM module with VMX subsystem has the potential to allow an attacker to execute arbitrary code on the host system or escalate privileges. It is crucial to update the Kernel package to version v5.15.12 or a later one to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, if successfully exploited, an attacker could execute arbitrary code on the host system or escalate privileges.
Any system running the affected version of the Kernel package, specifically the KVM module with VMX subsystem, is potentially vulnerable.
There are no known instances of this vulnerability being exploited at the time of this report.
Yes, the vulnerability has been fixed in the Linux Kernel version v5.15.12.
More information about this vulnerability can be found in the source database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002835.json.
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