Out-of-Bound Access in uclamp in Kernel
Summary
GSD-2021-1000412: sched: Fix out-of-bound access in uclamp. Affects Kernel versions >= 69842cba9ace84849bb9b8edcdf2cefccd97901c, < 687f523c134b7f0bd040ee1230f6d17990d54172. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process scheduling, memory management, and device drivers. The uclamp subsystem in the Kernel allows users to control the CPU utilization of tasks. However, a vulnerability has been discovered in the uclamp subsystem that could lead to out-of-bound access.
Vulnerability Detail
The vulnerability in the uclamp subsystem of the Kernel arises from an out-of-bound access issue. This vulnerability could potentially be exploited by an attacker to gain unauthorized access or execute arbitrary code on a vulnerable system. The issue was introduced in version v5.3 of the Kernel and was fixed in version v5.4.120. 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
The out-of-bound access vulnerability in the uclamp subsystem of the Kernel can be fixed by updating to version v5.4.120 or later. It is important to promptly apply the patch to ensure the security and stability of the system. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The uclamp subsystem in the Kernel allows users to control the CPU utilization of tasks by setting utilization clamps.
The impact of this vulnerability is not yet proven. However, if successfully exploited, it could lead to unauthorized access or arbitrary code execution.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will provide real-time alerts for open-source vulnerabilities.
Yes, a patch is available in version v5.4.120 of the Linux Kernel. It is recommended to update to this version or later to fix the vulnerability.
You can find more information about this vulnerability in the GSD-2021-1000412 JSON file available in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000412.json).
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