Vulnerability in Kernel: dm rq: don't queue request to blk-mq during DM suspend
Summary
GSD-2021-1002149: dm rq: don't queue request to blk-mq during DM suspend. Affects Kernel versions < b4459b11e84092658fa195a2587aff3b9637f0e7. 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 communication between hardware and software. It provides essential services and functions for the proper functioning of the system. One of its key features is the Device Mapper (DM), which allows for the creation of virtual block devices. These virtual devices can be used for various purposes, such as encryption, volume management, and snapshotting. However, a vulnerability has been discovered in the Kernel's DM component that can lead to potential security risks.
Vulnerability Detail
The vulnerability in the Kernel's DM component involves the queuing of requests to the block multi-queue (blk-mq) during DM suspend. When the DM is suspended, it should not allow any new requests to be queued to the blk-mq. However, due to a flaw, requests can still be queued during this state. This vulnerability can potentially be exploited by an attacker to manipulate or disrupt the normal operation of the system, leading to denial of service or other security breaches.
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. The recommended solution is to update the Kernel to the fixed version.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel's DM component that allows requests to be queued to the blk-mq during DM suspend. This vulnerability can be exploited to manipulate or disrupt the system's operation. It is crucial to update the Kernel to the fixed version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially be exploited by an attacker to manipulate or disrupt the normal operation of the system, leading to denial of service or other security breaches.
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 in the software.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to patch the Kernel to the fixed version to prevent any potential exploitation.
The recommended mitigation is to update the Kernel to the fixed version. This will ensure that the vulnerability is patched and the system is protected.
You can refer to the source link provided in the vulnerability details for more information about this vulnerability.
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