KVM: x86: Avoid Calling x86 Emulator Without a Decoded Instruction
Summary
GSD-2022-1003457: KVM: x86: avoid calling x86 emulator without a decoded instruction. Affects Kernel versions >= 4aa2691dcbd38ce1c461188799d863398dd2865d, < 531d1070d864c78283b7597449e60ddc53319d88. No fix is published. How to fix ↓
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Background
The Kernel package is an essential component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The KVM (Kernel-based Virtual Machine) subsystem within the Kernel allows running virtual machines on Linux. It utilizes hardware virtualization extensions to provide efficient and secure virtualization. The x86 emulator is a component of KVM that emulates x86 instructions for virtual machines. This vulnerability specifically affects the x86 emulator in KVM.
Vulnerability Detail
The vulnerability arises from a situation where the x86 emulator is called without a decoded instruction. This can lead to potential security vulnerabilities, although the actual impact and attack plausibility have not been proven yet. The vulnerability was introduced in version v5.12 of the Linux Kernel and was fixed in version v5.15.45. The vulnerability is tracked with the ID GSD-2022-1003457.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The KVM x86 emulator vulnerability, identified by the ID GSD-2022-1003457, can potentially lead to security issues. It is crucial to update the Linux Kernel to version v5.15.45 or later to mitigate this vulnerability. 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, it is important to apply the fix to ensure the security of the system.
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 to the playground, and it will alert you if the vulnerability is present.
No, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
The remote exploitability of this vulnerability is currently unknown. However, it is always recommended to apply security updates to mitigate potential risks.
You can find more information about this vulnerability in the GSD-2022-1003457 JSON file available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1003xxx/GSD-2022-1003457.json
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