Data Race Vulnerability in Linux Kernel
Summary
GSD-2021-1000863: perf: Fix data race between pin_count increment/decrement. Affects Kernel versions >= fe4b04fa31a6dcf4358aa84cf81e5a7fd079469b, < e0e5c5ea305d21a4f8a3f8ac0b1a47fc7591d492. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. It is widely used in various devices, including servers, desktops, and embedded systems. The vulnerability identified in this report relates to a data race issue in the kernel's performance monitoring subsystem.
Vulnerability Detail
The data race vulnerability occurs when multiple threads or processes access shared data concurrently without proper synchronization. In this case, the issue arises in the pin_count increment/decrement operations within the performance monitoring subsystem of the Linux Kernel. This data race can lead to inconsistent or incorrect pin_count values, potentially causing various problems such as memory corruption, crashes, or privilege escalation. The vulnerability was introduced in version 2.6.39 of the kernel and has been fixed in version 4.14.237.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The data race vulnerability in the Linux Kernel's performance monitoring subsystem can lead to various issues, including memory corruption and privilege escalation. It is crucial to update the kernel to version 4.14.237 or later to mitigate this vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
A data race vulnerability occurs when multiple threads or processes access shared data concurrently without proper synchronization, leading to unexpected behavior or security issues.
The data race vulnerability in the Linux Kernel's performance monitoring subsystem can result in memory corruption, crashes, or privilege escalation.
The vulnerability was introduced in version 2.6.39 of the Linux Kernel.
To fix this vulnerability, update the Linux Kernel to version 4.14.237 or later, which includes the necessary patch.
Users can obtain the updated Linux Kernel from the official Linux Kernel repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
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