Use-after-free vulnerability in i40e_client_subtask() in Kernel
Summary
GSD-2021-1000204: i40e: Fix use-after-free in i40e_client_subtask(). Affects Kernel versions >= 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b, < 1fd5d262e7442192ac7611ff1597a36c5b044323. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core functionalities and acts as an interface between the hardware and software layers. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The i40e_client_subtask() function is a part of the i40e driver, which is responsible for managing Intel Ethernet Connection X710/XL710 devices. This vulnerability specifically affects the i40e_client_subtask() function in the Kernel.
Vulnerability Detail
The use-after-free vulnerability in i40e_client_subtask() allows an attacker to exploit a freed memory region, leading to potential memory corruption or arbitrary code execution. This vulnerability was introduced in version v4.16 of the Linux Kernel by commit 7b0b1a6d0ac983ce1928432285d0222d4fb7c38b. It was fixed in version v5.12.5 by commit 1fd5d262e7442192ac7611ff1597a36c5b044323. 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 known workaround for this vulnerability. It is crucial to update to the fixed version of the Linux Kernel to mitigate the risk.
Conclusion
The use-after-free vulnerability in i40e_client_subtask() poses a potential risk of memory corruption or arbitrary code execution. It is crucial to update the Linux Kernel to version v5.12.5 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The i40e_client_subtask() function is a part of the i40e driver in the Linux Kernel. It is responsible for managing Intel Ethernet Connection X710/XL710 devices.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption or arbitrary code execution.
The use-after-free vulnerability in i40e_client_subtask() can be exploited by an attacker to manipulate freed memory and potentially execute arbitrary code.
There is no evidence of this vulnerability being exploited in the wild. However, it is important to apply the fix to ensure system security.
No, only versions from v4.16 to v5.12.4 are affected. The vulnerability was fixed in version v5.12.5.
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