Vulnerability in Linux Kernel: cgroup: Use separate src/dst nodes when preloading css_sets for migration
Summary
GSD-2022-1004799: cgroup: Use separate src/dst nodes when preloading css_sets for migration. Affects Kernel versions >= f817de98513d060023be4fa1d061b29a6515273e, < cec2bbdcc14fbaa6b95ee15a7c423b05d97038be. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that forms the foundation of various Linux distributions. It provides essential functionality for managing system resources and facilitating communication between hardware and software components. One of its key features is the cgroup (control group) subsystem, which allows for resource allocation and isolation. However, a vulnerability has been discovered in the cgroup subsystem that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the cgroup subsystem of the Linux Kernel involves the improper handling of css_sets during migration. Specifically, when preloading css_sets for migration, the same source (src) and destination (dst) nodes are used, which can lead to a security issue. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, an attacker could potentially gain unauthorized access or perform other malicious activities on the affected system. This vulnerability was introduced in version v3.16 of the Linux Kernel and has been fixed in version v4.19.253.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, a vulnerability has been identified in the cgroup subsystem of the Linux Kernel that could potentially be exploited by attackers. It is recommended to update the Linux Kernel to version v4.19.253 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is an open-source operating system kernel that serves as the core component of various Linux distributions. It provides essential functionality for managing system resources and facilitating communication between hardware and software components.
The cgroup (control group) subsystem is a feature of the Linux Kernel that allows for resource allocation and isolation. It provides mechanisms for controlling and monitoring resource usage by processes and groups of processes.
The vulnerability occurs due to the improper handling of css_sets during migration in the cgroup subsystem. Specifically, the same source and destination nodes are used when preloading css_sets, which can lead to a security issue.
If successfully exploited, this vulnerability could allow an attacker to gain unauthorized access or perform other malicious activities on the affected system.
Yes, this vulnerability has been fixed in version v4.19.253 of the Linux Kernel.
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