Critical Memory Allocation Vulnerability in Linux Kernel - CVE-2023-53029
Summary
CVE-2023-53029: In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Fix the use of GFP_KERNEL in atomic context on rt The commit 4af1b64f80fb ("octeontx2-pf: Fix lmtst ID used in aura free") uses the get/pu... Affects linux versions < 6.1.8-1. Fixed in 6.1.8-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, managing system resources and hardware communication. It is widely used across various platforms, including servers, desktops, and embedded systems. This vulnerability affects the kernel's memory allocation mechanism, specifically in the octeontx2-pf driver, which is responsible for handling network interfaces on Marvell OcteonTX hardware.
Vulnerability Detail
CVE-2023-53029 is a vulnerability in the Linux kernel that arises from improper handling of memory allocation in atomic context. The issue occurs when the GFP_KERNEL flag is used, which allows for sleeping in contexts where it is not safe to do so. This can lead to system instability and potential denial of service, as it may cause the kernel to hang or crash. The vulnerability was introduced in commit 4af1b64f80fb and was partially addressed in commit 87b93b678e95, but it still affects real-time (RT) kernels, resulting in warnings and potential system failures.
How To Fix
Minimum fixed version
6.1.8-1
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. It is recommended to apply the patch as soon as it is available to mitigate the risk.
Conclusion
CVE-2023-53029 is a significant vulnerability in the Linux kernel that can lead to serious system issues if not addressed. Users are strongly encouraged to update their systems to the latest patched version to mitigate risks associated with this vulnerability. Utilizing tools like Vulert can further enhance security by providing real-time monitoring for vulnerabilities.
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FAQ
CVE-2023-53029 is a vulnerability in the Linux kernel related to improper memory allocation in atomic contexts, which can lead to system instability.
This vulnerability can cause the kernel to hang or crash, leading to potential denial of service and instability in systems using affected versions of the Linux kernel.
If you are using a version of the Linux kernel prior to 6.1.8-1, your system may be vulnerable. You can check your kernel version using the command 'uname -r'.
The best way to protect your system is to update to the patched version of the Linux kernel (6.1.8-1 or later) as soon as possible.
Vulert is a tool that monitors and alerts in real-time for open-source vulnerabilities in your software using a manifest file like package-lock.json. You can check if your application is affected by this vulnerability using the Vulert playground without any signup.
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