Memory Leak Vulnerability in Linux Kernel - ibmvnic Package
Summary
CVE-2022-49906: In the Linux kernel, the following vulnerability has been resolved: ibmvnic: Free rwi on reset success Free the rwi structure in the event that the last rwi in the list processed successfully. Affects linux versions < 6.0.8-1. Fixed in 6.0.8-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to applications. The ibmvnic driver is specifically designed for IBM virtual network interface cards, facilitating network communication in virtualized environments. This driver is crucial for ensuring efficient data transfer and connectivity in cloud and enterprise solutions. However, it is susceptible to vulnerabilities that can lead to memory leaks, impacting system performance and stability.
Vulnerability Detail
The vulnerability identified as CVE-2022-49906 in the Linux kernel pertains to the ibmvnic driver. It arises from a flaw in the logic introduced by a previous commit, which fails to properly free the rwi structure when the last rwi in the list is processed successfully. This oversight results in a memory leak of 32 bytes, which can accumulate over time, potentially leading to degraded system performance and increased memory consumption. The vulnerability is particularly concerning in environments where the ibmvnic driver is heavily utilized, as it may lead to resource exhaustion and system instability.
How To Fix
Minimum fixed version
6.0.8-1
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 provided for this vulnerability. The best course of action is to apply the patch by updating to the fixed version of the Linux kernel.
Conclusion
CVE-2022-49906 represents a significant memory leak vulnerability in the Linux kernel's ibmvnic driver, which can adversely affect system performance. It is crucial for users to update to the patched version of the Linux kernel to safeguard their systems against potential instability and resource exhaustion. Utilizing tools like Vulert can help in monitoring for such vulnerabilities in real-time.
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FAQ
CVE-2022-49906 is a vulnerability in the Linux kernel's ibmvnic driver that causes a memory leak when the last rwi in the list is processed successfully.
This vulnerability can lead to increased memory consumption over time, potentially resulting in degraded performance and system instability.
Yes, a patch is available in the form of an updated Linux kernel version 6.0.8-1, which addresses the memory leak issue.
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 without any signup.
While there are no specific workarounds, it is advisable to monitor system performance closely and plan for an update as soon as possible to mitigate the risks associated with this vulnerability.
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