Vulnerability in Kernel package: xen/x86: fix PV trap handling on secondary processors
Summary
GSD-2021-1001547: xen/x86: fix PV trap handling on secondary processors. Affects Kernel versions >= f87e4cac4f4e940b328d3deb5b53e642e3881f43, < e316892ec618b0476111bf720415fd62e084762b. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for the system's hardware, software, and processes. The xen/x86 subsystem within the Kernel package is responsible for handling virtualization on x86 architectures. This vulnerability specifically affects the PV trap handling on secondary processors within the xen/x86 subsystem.
Vulnerability Detail
The vulnerability arises from a flaw in the PV trap handling mechanism on secondary processors in the xen/x86 subsystem. This flaw could potentially be exploited by an attacker to execute arbitrary code or escalate privileges on a vulnerable system. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v4.14.249 by commit e316892ec618b0476111bf720415fd62e084762b. The vulnerability was introduced in version v2.6.23 by commit f87e4cac4f4e940b328d3deb5b53e642e3881f43.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in the Kernel package's xen/x86 subsystem, specifically related to PV trap handling on secondary processors, has been identified and fixed in Linux Kernel version v4.14.249. It is crucial to update the Kernel package to the fixed version to mitigate the potential risks associated with 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 it has not been proven yet. However, if successfully exploited, an attacker could execute arbitrary code or escalate privileges on a vulnerable system.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
No, there are no known workarounds for this vulnerability. It is recommended to update the Kernel package to the fixed version.
The remote exploitability of this vulnerability is currently unknown as its impact and attack plausibility have not been proven yet.
For further support on vulnerability remediation, you can contact info@devnack.com.
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