Uninitialized Value in r871xu_drv_init() in Kernel
Summary
GSD-2022-1003666: staging: rtl8712: fix uninit-value in r871xu_drv_init(). Affects Kernel versions < 52a0d88c328098b4e9fb8f2f3877fec0eff4104b. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that provides core functionality and acts as a bridge between hardware and software. It manages system resources, facilitates communication between different software components, and enables the execution of user programs. The rtl8712 module in the staging directory of the Kernel is responsible for supporting certain Realtek wireless chipsets. However, a vulnerability has been identified in the r871xu_drv_init() function within this module.
Vulnerability Detail
The vulnerability in r871xu_drv_init() arises from the use of uninitialized values. This can lead to unpredictable behavior and potential security risks. An attacker may be able to exploit this vulnerability to gain unauthorized access, execute arbitrary code, or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been fully proven. It is important to note that this vulnerability has been addressed in the Linux Kernel version v5.4.198 by commit 52a0d88c328098b4e9fb8f2f3877fec0eff4104b.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can disable the rtl8712 module by blacklisting it. This can be achieved by adding the following line to the /etc/modprobe.d/blacklist.conf file:
blacklist rtl8712
After adding the line, the system should be rebooted for the changes to take effect. However, it is important to note that this workaround may result in the loss of wireless functionality for devices relying on the affected Realtek chipsets.
Conclusion
In conclusion, the vulnerability in r871xu_drv_init() within the rtl8712 module of the Kernel can lead to unpredictable behavior and potential security risks. It is crucial to update the Linux Kernel to version v5.4.198 or later to mitigate this vulnerability. Alternatively, users can apply the temporary workaround of blacklisting the rtl8712 module, but this may result in the loss of wireless functionality. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific system configuration and the presence of additional security measures. In some cases, an attacker may be able to gain unauthorized access, execute arbitrary code, or cause a denial-of-service condition.
There is currently no evidence to suggest that this vulnerability has been exploited in real-world attacks. However, it is always recommended to apply security patches and updates as soon as they become available.
No, this vulnerability is fixed in the Linux Kernel version v5.4.198 and later. It is recommended to update to the latest available version to ensure the security of your system.
While applying the workaround of blacklisting the rtl8712 module can mitigate the vulnerability temporarily, it is still advisable to update the Kernel to the patched version. This ensures a comprehensive fix and avoids potential issues that may arise from the workaround.
Detailed information about this vulnerability, including the commit that fixes it, can be found in the Linux Kernel source code repository. The specific commit can be viewed at: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=52a0d88c328098b4e9fb8f2f3877fec0eff4104b
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