Memory Leak Vulnerability in perf bench futex
Summary
GSD-2021-1002287: perf bench futex: Fix memory leak of perf_cpu_map__new(). Affects Kernel versions >= 9c3516d1b850ea938b074df33e4c86d721c77720, < 2ada5c0877f4aa9b0749e7777557d9a5d2973082. No fix is published. How to fix ↓
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Background
The perf bench futex is a performance benchmarking tool in the Linux Kernel. It is used to measure the performance of futex operations, which are used for synchronization between processes. The tool creates multiple threads and performs futex operations to evaluate their efficiency. However, a memory leak vulnerability has been discovered in the perf_cpu_map__new() function of perf bench futex.
Vulnerability Detail
The memory leak vulnerability in perf_cpu_map__new() function allows an attacker to cause a memory leak by repeatedly calling the function without freeing the allocated memory. This can lead to a gradual depletion of available memory resources, potentially resulting in system instability or denial of service. The vulnerability was introduced in Linux Kernel version v5.4 and has been fixed in version v5.10.82.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the patch or update the Linux Kernel to the fixed version.
Conclusion
The memory leak vulnerability in perf bench futex's perf_cpu_map__new() function can lead to memory depletion and potential system instability or denial of service. It is crucial to update the Linux Kernel to version v5.10.82 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
perf bench futex is a performance benchmarking tool in the Linux Kernel used to measure the performance of futex operations.
A memory leak vulnerability occurs when a program or function does not release allocated memory properly, leading to a gradual depletion of available memory resources.
perf_cpu_map__new() is a function in perf bench futex that allocates memory for CPU mapping.
The memory leak vulnerability in perf_cpu_map__new() can result in system instability or denial of service due to the gradual depletion of available memory resources.
To fix this vulnerability, update the Linux Kernel to version v5.10.82 or later, which includes the necessary patch.
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