Critical Mode Misalignment in Linux Kernel's blkdev_put() - CVE-2023-53130
Summary
CVE-2023-53130: Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. Affects linux versions < 6.1.20-1. Fixed in 6.1.20-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and flexibility, making it a popular choice for servers, desktops, and embedded systems. However, like any complex software, it is susceptible to vulnerabilities. CVE-2023-53130 highlights a specific issue within the block device management that can lead to resource leaks, potentially affecting system performance and reliability.
Vulnerability Detail
CVE-2023-53130 arises from a misalignment in the mode used during the blkdev_put() function call within the Linux kernel. When the disk_scan_partitions() function is invoked with the 'FMODE_EXCL' flag, it inadvertently calls blkdev_get_by_dev() without this flag. Consequently, blkdev_put() is still executed with 'FMODE_EXCL', leading to a leak in the 'bd_holders' counter. This vulnerability can result in resource mismanagement, impacting system stability and performance.
How To Fix
Minimum fixed version
6.1.20-1
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 to the fixed version of the Linux package.
Conclusion
CVE-2023-53130 is a significant vulnerability in the Linux kernel that can lead to resource leaks due to improper mode handling in the blkdev_put() function. It is crucial for users to update their systems to the patched version to ensure stability and performance. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2023-53130 is a vulnerability in the Linux kernel that involves a mode misalignment in the blkdev_put() function, leading to potential resource leaks.
This vulnerability can lead to resource mismanagement, which may impact system performance and stability.
The vulnerability affects the Linux kernel versions prior to 6.1.20-1 in Debian 12 and 13.
You can use Vulert, which monitors open-source vulnerabilities in your software. By checking your manifest file like package-lock.json, you can determine if your application is affected.
Currently, there are no known workarounds. The recommended action is to update to the patched version of the Linux kernel.
References
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