KVM: x86/svm: Clear reserved bits written to PerfEvtSeln MSRs
Summary
GSD-2022-1002202: KVM: x86/svm: Clear reserved bits written to PerfEvtSeln MSRs. Affects Kernel versions >= ca724305a2b02abcbecbf22577536fc8e965ab4f, < 01f700bae439fdfc56f0e2c0d0f56b0d20aaa999. 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, including managing hardware resources, process scheduling, and device drivers. The vulnerability affects the Kernel package in the Linux ecosystem. The Kernel package is responsible for virtualization and provides support for the Kernel-based Virtual Machine (KVM) on x86 architecture with SVM (Secure Virtual Machine) extensions.
Vulnerability Detail
The vulnerability in the Kernel package allows an attacker to write reserved bits to the PerfEvtSeln MSRs (Model Specific Registers) in the x86/svm subsystem of KVM. This can lead to unexpected behavior and potentially be exploited to gain unauthorized access or perform malicious actions. The vulnerability was introduced in version v4.2 of the Linux Kernel and is fixed in version v5.4.189. It is important to note that the actual impact and attack plausibility of this vulnerability have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the Kernel package affecting the x86/svm subsystem of KVM has been identified and fixed in version v5.4.189 of the Linux Kernel. It is recommended to update to this version or a later one to ensure the security and stability of the system. 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 actual attack plausibility has not been proven. However, if successfully exploited, it could lead to unauthorized access or malicious actions.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it in real-time to identify any open-source vulnerabilities, including this one.
Yes, a patch for this vulnerability is available in the Linux Kernel version v5.4.189. It is recommended to update to this version or a later one to fix the vulnerability.
As no specific workaround has been mentioned for this vulnerability, it is recommended to prioritize updating to the fixed version of the Linux Kernel as soon as possible to mitigate the risk.
You can find more information about this vulnerability in the GSD-2022-1002202 JSON file available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002202.json
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