Use-after-free vulnerability in aio package
Summary
GSD-2021-1002430: aio: fix use-after-free due to missing POLLFREE handling. Affects Kernel versions >= 2c14fa838cbefc23cf1c73ca167ed85b274b2913, < 321fba81ec034f88aea4898993c1bf15605c023f. No fix is published. How to fix ↓
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Background
The aio package is a component of the Linux Kernel, which is responsible for handling asynchronous I/O operations. It provides an interface for performing I/O operations without blocking the execution of the program. The package is widely used in Linux-based systems to improve performance and responsiveness. However, a use-after-free vulnerability has been discovered in the aio package, which can lead to potential security risks.
Vulnerability Detail
The use-after-free vulnerability in the aio package is caused by the absence of proper handling for POLLFREE events. This vulnerability allows an attacker to exploit a freed memory region, leading to potential memory corruption or arbitrary code execution. The vulnerability was introduced in version v4.18 of the Linux Kernel and was fixed in version v4.19.221. 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
No specific workaround has been provided for this vulnerability.
Conclusion
The use-after-free vulnerability in the aio package of the Linux Kernel can pose potential security risks. It is recommended to update the Linux Kernel to version v4.19.221 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The aio package is a component of the Linux Kernel that handles asynchronous I/O operations, allowing programs to perform I/O without blocking execution.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed, potentially leading to memory corruption or arbitrary code execution.
This vulnerability can be exploited by an attacker to manipulate freed memory regions, potentially leading to memory corruption or executing arbitrary code.
The vulnerability was introduced in version v4.18 of the Linux Kernel. Versions prior to v4.19.221 are affected.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
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