Data Race Vulnerability in Linux Kernel
Summary
GSD-2021-1000962: perf: Fix data race between pin_count increment/decrement. Affects Kernel versions >= fe4b04fa31a6dcf4358aa84cf81e5a7fd079469b, < c64a3be39fa9fe473dd85cf1e6a4a7b27c0d935f. No fix is published. How to fix ↓
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Background
The Linux Kernel is the core component of the Linux operating system. It provides essential functionality for the system, including managing hardware resources, process scheduling, and device drivers. The kernel is responsible for maintaining the security and stability of the entire system. However, a data race vulnerability has been discovered in the kernel, which can lead to unpredictable behavior and potential security risks.
Vulnerability Detail
The data race vulnerability in the Linux Kernel occurs when there is a race condition between the increment and decrement operations of the pin_count variable. This vulnerability was introduced in version v2.6.39 and affects all subsequent versions until it was fixed in v5.10.44. The pin_count variable is used to track the number of pins on a performance event, and the data race can result in incorrect pin count values. This can lead to various issues, including memory corruption, crashes, and potential privilege escalation attacks.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the kernel is not immediately feasible, a temporary workaround is to avoid using the affected functionality that relies on the pin_count variable. By avoiding the use of performance events that require pinning, the data race vulnerability can be mitigated. However, this workaround may impact the performance monitoring capabilities of the system.
Conclusion
The data race vulnerability in the Linux Kernel can have serious consequences, including memory corruption and potential privilege escalation attacks. It is crucial to update the kernel to version v5.10.44 or later to fix this vulnerability. If you need further assistance or support in addressing this vulnerability, 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. This can lead to unpredictable behavior and potential security risks.
The data race vulnerability in the Linux Kernel can result in memory corruption, crashes, and potential privilege escalation attacks. It is important to patch the vulnerability to ensure the security and stability of the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will analyze the dependencies and alert you if any vulnerabilities are found.
Yes, the data race vulnerability in the Linux Kernel has been fixed in version v5.10.44. It is recommended to update your kernel to this version or later to ensure the vulnerability is patched.
At the time of this report, there are no known exploits for this vulnerability. However, it is important to patch the vulnerability as soon as possible to mitigate any potential risks.
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