Memory Leak Vulnerability in Linux Kernel - CVE-2023-53136
Summary
CVE-2023-53136: In the Linux kernel, the following vulnerability has been resolved: af_unix: fix struct pid leaks in OOB support syzbot reported struct pid leak [1]. 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, responsible for managing hardware resources and providing essential services to 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 that can affect system performance and security. CVE-2023-53136 is a specific vulnerability that arises from improper handling of out-of-band (OOB) messages, leading to potential memory leaks.
Vulnerability Detail
CVE-2023-53136 is a memory leak vulnerability in the Linux kernel's af_unix implementation. The issue occurs when the function queue_oob() calls maybe_add_creds(), which can hold a reference to a process ID (pid). However, the skb->destructor is not set, resulting in a memory leak when kfree_skb() or consume_skb() is called. This vulnerability can lead to unreferenced objects remaining in memory, potentially exhausting system resources and affecting overall system stability.
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 available patch as soon as possible.
Conclusion
CVE-2023-53136 is a critical memory leak vulnerability in the Linux kernel that can lead to significant resource management issues. It is essential for users to update their systems to the patched version to mitigate the risks associated with this vulnerability. Regular monitoring and timely updates are crucial for maintaining system security.
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FAQ
CVE-2023-53136 is a memory leak vulnerability in the Linux kernel's af_unix implementation that can lead to resource exhaustion.
You can use Vulert, which monitors open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected without any signup.
The vulnerability can lead to memory leaks, which may exhaust system resources and impact overall system performance and stability.
You can update your Linux kernel by running the command: 'sudo apt-get update && sudo apt-get install linux' to install the patched version 6.1.20-1.
Currently, there are no specific workarounds available. The recommended action is to apply the patch as soon as possible.
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