Fix the definition of the fixmap area in powerpc/64
Summary
GSD-2021-1000233: powerpc/64: Fix the definition of the fixmap area. Affects Kernel versions >= 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3, < a84df7c80bdac598d6ac9268ae578da6928883e8. No fix is published. How to fix ↓
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Background
The vulnerability affects the Kernel package in the Linux ecosystem. The Kernel is the core component of the operating system that manages system resources and provides an interface for software to interact with the hardware. The powerpc/64 architecture is specifically impacted by this vulnerability. The fixmap area is a reserved memory region used by the Kernel for mapping fixed virtual addresses to physical memory. The incorrect definition of the fixmap area in powerpc/64 can lead to potential security vulnerabilities.
Vulnerability Detail
The vulnerability arises from an incorrect definition of the fixmap area in powerpc/64. The exact impact and attack plausibility of this vulnerability have not been proven yet. However, it is important to address this issue to prevent potential security risks. The vulnerability was introduced in Linux Kernel version v5.5 by commit 265c3491c4bc8d40587996d6ee2f447a7ccfb4f3 and is fixed in version v5.12.4 by commit a84df7c80bdac598d6ac9268ae578da6928883e8.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in the powerpc/64 architecture's fixmap area definition can pose potential security risks. It is recommended to update the Linux Kernel to version v5.12.4 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The exact impact of this vulnerability is not yet proven. However, it is important to address it to mitigate potential security risks.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and Vulert will provide real-time alerts for open-source vulnerabilities.
No specific workaround has been mentioned for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
The remote exploitability of this vulnerability has not been determined yet.
You can find more information about this vulnerability in the vulnerability database maintained by the Cloud Security Alliance. The source link is available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000233.json
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