Memory Leak in cgroup: Fix memory leak caused by missing cgroup_bpf_offline
Summary
UVI-2021-1002129: cgroup: Fix memory leak caused by missing cgroup_bpf_offline. Affects Kernel versions >= 2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e, < b529f88d93884cf8ccafda793ee3d27b82fa578d. No fix is published. How to fix ↓
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Background
The cgroup package is a feature in the Linux Kernel that allows for the management and control of resources, such as CPU, memory, and I/O, for groups of processes. It provides a way to limit and allocate resources to different processes or groups of processes. The cgroup_bpf_offline function is responsible for handling the offline state of cgroup BPF programs. However, a missing implementation of cgroup_bpf_offline in the cgroup package can lead to a memory leak.
Vulnerability Detail
The vulnerability arises from the absence of the cgroup_bpf_offline function in the cgroup package. This can result in a memory leak, where memory resources are not properly released, leading to potential resource exhaustion and system instability. An attacker could potentially exploit this vulnerability to exhaust system memory, causing denial of service or other malicious activities. The vulnerability was introduced in version v5.10 of the Linux Kernel and has been fixed in version v5.14.16.
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. The recommended solution is to update the Linux Kernel to the fixed version.
Conclusion
The memory leak vulnerability in the cgroup package can lead to resource exhaustion and system instability. It is crucial to update the Linux Kernel to version v5.14.16 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
cgroup is a feature in the Linux Kernel that allows for the management and control of resources, such as CPU, memory, and I/O, for groups of processes.
The vulnerability can lead to a memory leak, potentially causing resource exhaustion and system instability. It could be exploited by attackers for denial of service or other malicious activities.
To fix this vulnerability, update the Linux Kernel to version v5.14.16 or later, which includes the necessary fix.
There is no specific workaround mentioned for this vulnerability. Updating the Kernel to the fixed version is the recommended solution.
The vulnerability was introduced in version v5.10 of the Linux Kernel and fixed in version v5.14.16.
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