Vulnerability in Kernel: arm64: mm: Don't invalidate FROM_DEVICE buffers at start of DMA transfer
Summary
GSD-2022-1004295: arm64: mm: Don't invalidate FROM_DEVICE buffers at start of DMA transfer. Affects Kernel versions < 9e22858cdef7d1ecce0fa1f444418008e8c10178. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functionalities such as memory management, process scheduling, and device drivers. The arm64 architecture is specifically designed for 64-bit ARM processors. In this context, the mm subsystem in the Kernel is responsible for managing memory-related operations. However, a vulnerability has been identified in the arm64 mm subsystem that involves invalidating FROM_DEVICE buffers at the start of a DMA (Direct Memory Access) transfer.
Vulnerability Detail
The vulnerability in the arm64 mm subsystem allows an attacker to manipulate DMA transfers by invalidating FROM_DEVICE buffers at the beginning of the transfer. This can lead to various security issues, including data corruption, privilege escalation, and potential code execution. By exploiting this vulnerability, an attacker could gain unauthorized access to sensitive information or compromise the integrity of the system. It is important to note that 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
As this vulnerability has been fixed in the latest version of the Kernel, there is no specific workaround available. It is strongly advised to update the Kernel to the patched version.
Conclusion
The vulnerability in the arm64 mm subsystem of the Kernel poses a potential risk to the security and integrity of affected systems. It is crucial to update the Kernel to the latest version that includes the necessary fix. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability can range from data corruption to privilege escalation and potential code execution. It could allow an attacker to gain unauthorized access to sensitive information or compromise the integrity of the system.
There is no evidence of this vulnerability being exploited in the wild at the moment. However, it is crucial to apply the necessary updates to mitigate the risk.
You can use Vulert's playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
The vulnerability affects systems running the arm64 architecture and using the affected versions of the Kernel. Any system meeting these criteria is potentially vulnerable.
You can find more information about this vulnerability in the official Linux Kernel security advisories and the vulnerability database maintained by the Cloud Security Alliance. The references link provided in the vulnerability details can be used as a starting point.
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