Use-After-Free Vulnerability in Linux Kernel i3c Driver
Summary
DEBIAN-CVE-2024-57984: In the Linux kernel, the following vulnerability has been resolved: i3c: dw: Fix use-after-free in dw_i3c_master driver due to race condition In dw_i3c_common_probe, &master->hj_work is bound with dw_i3c_hj_work. Affects linux versions < 6.12.13-1. Fixed in 6.12.13-1. How to fix ↓
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Background
The Linux kernel is a core component of many operating systems, providing essential services for hardware and software interaction. It supports various drivers, including the i3c driver, which manages I3C (Improved Inter-Integrated Circuit) devices. This vulnerability affects the i3c driver, specifically the dw_i3c_master driver, which is responsible for handling I3C master operations. The issue arises from a race condition that can lead to a use-after-free (UAF) scenario, potentially compromising system stability and security.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the dw_i3c_master driver due to a race condition. When the module is removed, the cleanup process can free the memory associated with the I3C master before the work associated with it is canceled. This can lead to a use-after-free situation where the freed memory is accessed, resulting in undefined behavior, crashes, or potential exploitation by malicious actors. The vulnerability is triggered when the dw_i3c_common_remove function is called, leading to a sequence of operations that improperly manage memory.
How To Fix
Minimum fixed version
6.12.13-1
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 package as described above.
Conclusion
The use-after-free vulnerability in the Linux kernel's i3c driver poses significant risks to system stability and security. It is crucial for users to update their systems to the patched version to mitigate these risks. Regular monitoring and vulnerability management practices, such as using Vulert, can help maintain the security of open-source software.
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FAQ
A use-after-free vulnerability occurs when a program continues to use a memory location after it has been freed, potentially leading to crashes or exploitation.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
Not addressing this vulnerability can lead to system instability, crashes, or exploitation by attackers, compromising the security of your system.
Yes, this vulnerability affects specific versions of the Linux kernel, particularly those prior to version 6.12.13-1.
If immediate updates are not possible, consider isolating the affected system from critical networks and monitoring for unusual activity until a patch can be applied.
References
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