KVM: VMX: Prevent RSB underflow before vmenter
Summary
GSD-2022-1004147: KVM: VMX: Prevent RSB underflow before vmenter. Affects Kernel versions < afd743f6dde87296c6f3414706964c491bb85862. 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 and software components. The Kernel package is responsible for managing system resources, including memory, processes, and device drivers. It plays a crucial role in ensuring the stability, security, and performance of the Linux operating system.
Vulnerability Detail
The vulnerability identified as GSD-2022-1004147 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 allows for an RSB (Return Stack Buffer) underflow to occur before the vmenter operation. This underflow can potentially be exploited by an attacker to execute arbitrary code or escalate privileges 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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Conclusion
The vulnerability GSD-2022-1004147 in the Kernel package's KVM VMX subsystem has been identified and fixed in Linux Kernel version v5.18.14. Users are advised to update their Linux Kernel to the fixed version to mitigate the risk of potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is currently unknown as the attack plausibility has not been proven. However, if successfully exploited, an attacker could execute arbitrary code or escalate privileges within a virtual machine.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the Vulert Playground will analyze it for any open-source vulnerabilities, including GSD-2022-1004147.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the fixed version (v5.18.14 or later) to mitigate the risk.
No, this vulnerability affects the Kernel package in the Linux ecosystem. Therefore, it can potentially impact any Linux distribution that utilizes the affected Kernel version.
You can find more information about this vulnerability, including the fix commit and its impact, in the vulnerability details JSON file available on the GitHub repository of the Cloud Security Alliance's GSD Database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1004xxx/GSD-2022-1004147.json).
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