Fix wq size store permission state in dmaengine: idxd
Summary
GSD-2021-1000024: dmaengine: idxd: fix wq size store permission state. Affects Kernel versions >= c52ca478233c172b2d322b5241d6279a8661cbba, < 05b7791c4c4aa8304368fdc55ae911f6b34e7281. No fix is published. How to fix ↓
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Background
The dmaengine package is a subsystem in the Linux Kernel that provides a framework for implementing direct memory access (DMA) engines. These engines allow devices to transfer data to and from memory without involving the CPU. The idxd driver is a specific DMA engine driver that supports Intel Data Streaming Accelerator (Intel DSA) devices. The wq size store permission state vulnerability affects this driver.
Vulnerability Detail
The vulnerability in the dmaengine: idxd driver is related to the handling of work queue (wq) size store permission state. The issue was introduced in version v5.6 of the Linux Kernel and fixed in version v5.11.16. The exact impact and attack plausibility of this vulnerability have not been proven yet. However, if exploited, it could potentially lead to unauthorized access or privilege escalation. The vulnerability is tracked with the ID GSD-2021-1000024.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The wq size store permission state vulnerability in the dmaengine: idxd driver has been addressed in the Linux Kernel version v5.11.16. To ensure the security of your system, it is advised to update the Kernel to this version or a later one. For further support and assistance with vulnerability remediation, you can reach out to DevNack.com.
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FAQ
dmaengine is a subsystem in the Linux Kernel that provides a framework for implementing direct memory access (DMA) engines. These engines enable devices to transfer data to and from memory without involving the CPU.
The idxd driver is a specific DMA engine driver in the Linux Kernel that supports Intel Data Streaming Accelerator (Intel DSA) devices.
The exact impact and attack plausibility of this vulnerability have not been proven yet. However, if exploited, it could potentially lead to unauthorized access or privilege escalation.
To fix this vulnerability, update the Linux Kernel to version v5.11.16 or later, which includes the necessary fix for the dmaengine: idxd driver.
No specific workaround has been provided for this vulnerability. It is recommended to apply the official fix by updating the Linux Kernel.
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