Vulnerability in Linux Kernel: mm, compaction: fast_find_migrateblock() should return pfn in the target zone
Summary
GSD-2022-1003552: mm, compaction: fast_find_migrateblock() should return pfn in the target zone. Affects Kernel versions >= 70b44595eafe9c7c235f076d653a268ca1ab9fdb, < 7994d890123a6cad033f2842ff0177a9bda1cb23. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It is widely used in various devices, including servers, desktops, and embedded systems. The mm subsystem in the Linux Kernel handles memory management, including memory allocation, deallocation, and compaction. Compaction is the process of rearranging memory pages to reduce fragmentation and improve memory utilization. One of the functions in the compaction process is fast_find_migrateblock(), which is responsible for finding a suitable block of memory to migrate pages to. However, a vulnerability exists in this function, which can lead to potential security issues.
Vulnerability Detail
The vulnerability in fast_find_migrateblock() allows an attacker to obtain the physical frame number (pfn) of a memory page in a target zone. This information can be leveraged by an attacker to bypass certain security mechanisms or launch further attacks. The vulnerability was introduced in version v5.1 of the Linux Kernel and was fixed in version v5.10.121. 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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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in the fast_find_migrateblock() function of the Linux Kernel can potentially lead to security issues. It is recommended to update the kernel to version v5.10.121 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware.
The mm subsystem in the Linux Kernel handles memory management, including memory allocation, deallocation, and compaction.
Compaction is the process of rearranging memory pages to reduce fragmentation and improve memory utilization.
fast_find_migrateblock() is a function in the compaction process of the Linux Kernel, responsible for finding a suitable block of memory to migrate pages to.
The vulnerability allows an attacker to obtain the physical frame number (pfn) of a memory page in a target zone, which can be leveraged to bypass security mechanisms or launch further attacks.
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