bfq: Avoid merging queues with different parents
Summary
GSD-2022-1002675: bfq: Avoid merging queues with different parents. Affects Kernel versions >= 430a67f9d6169a7b3e328bceb2ef9542e4153c7c, < 8abc8763b11c35e03cc91d59fd0cd28d39f88ca9. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that manages system resources and provides an interface for applications to interact with the hardware. The bfq (Budget Fair Queueing) is an I/O scheduler in the Kernel that aims to provide low-latency and high-throughput disk access. It achieves this by assigning budgets to different processes and ensuring fair distribution of resources. However, a vulnerability has been discovered in bfq that allows the merging of queues with different parents, which can lead to potential security issues.
Vulnerability Detail
The vulnerability in bfq arises from the improper merging of queues with different parents. This can result in the misallocation of resources and potentially allow an attacker to gain unauthorized access or disrupt the system. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in Linux Kernel version v5.13 and has been fixed in version v5.18.3 by commit 8abc8763b11c35e03cc91d59fd0cd28d39f88ca9.
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
The bfq vulnerability in the Linux Kernel can potentially allow unauthorized access or system disruption. It is crucial to update to the fixed version of the Kernel (v5.18.3 or later) to mitigate the risk. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it has the potential to allow unauthorized access or disrupt the system.
You can use tools like Vulert (https://vulert.com) 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.
Yes, the vulnerability has been fixed in Linux Kernel version v5.18.3. It is recommended to update to this version or later to mitigate the risk.
There is no specific workaround mentioned for this vulnerability. It is recommended to update to the fixed version of the Linux Kernel.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002675.json) for more information.
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