Critical Vulnerability in Linux Kernel: Improper Use of sizeof in mtk-cmdq
Summary
DEBIAN-CVE-2024-56684: In the Linux kernel, the following vulnerability has been resolved: mailbox: mtk-cmdq: fix wrong use of sizeof in cmdq_get_clocks() It should be size of the struct clk_bulk_data, not data pointer pass to devm_kcalloc(). Affects linux versions < 6.12.3-1. Fixed in 6.12.3-1. How to fix ↓
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Background
The Linux kernel is a core component of the operating system that manages hardware and system resources. It provides essential services for all other parts of the operating system and is known for its robustness and flexibility. However, like any complex software, it can have vulnerabilities that may be exploited if not addressed promptly. This particular vulnerability affects the Linux kernel versions in Debian 13 and 14, specifically related to the mailbox subsystem and the improper use of the sizeof operator in the cmdq_get_clocks function.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the mailbox subsystem, specifically in the mtk-cmdq component. The issue arises from the incorrect use of the sizeof operator in the cmdq_get_clocks function, where the size of the struct clk_bulk_data should be used instead of the size of the data pointer passed to the devm_kcalloc() function. This flaw could lead to memory allocation issues, potentially causing system instability or crashes. If exploited, it could allow an attacker to manipulate memory allocation, leading to further vulnerabilities or system compromise.
How To Fix
Minimum fixed version
6.12.3-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the patch by updating the Linux kernel to the fixed version.
Conclusion
The vulnerability identified in the Linux kernel regarding the improper use of sizeof in the mtk-cmdq component poses a significant risk to system stability and security. Users are strongly encouraged to update their kernel to the patched version to mitigate potential threats. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
The vulnerability could lead to memory allocation issues, potentially causing system instability or crashes.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
While there are no specific workarounds, it is advisable to prioritize updating your kernel as soon as possible to mitigate the risk.
This vulnerability has been identified in the Linux kernel versions used in Debian 13 and 14, but similar issues may exist in other distributions.
The sizeof operator in C is used to determine the size of a data type or object in bytes. Incorrect usage can lead to serious memory management issues.
References
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