Excessive Memory Allocation Vulnerability in bpf
Summary
GSD-2022-1003654: bpf: Fix excessive memory allocation in stack_map_alloc(). Affects Kernel versions >= b936ca643ade11f265fa10e5fb71c20d9c5243f1, < 6c0a8c771a71b13b998327e1cff52526634ce47a. No fix is published. How to fix ↓
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Background
The bpf package is a component of the Linux Kernel, which is responsible for implementing Berkeley Packet Filters (BPF) in the kernel. BPF provides a way to safely execute user-defined programs inside the kernel, primarily used for network packet filtering and monitoring. This vulnerability affects the stack_map_alloc() function in the bpf package.
Vulnerability Detail
The stack_map_alloc() function in the bpf package suffers from an excessive memory allocation vulnerability. This vulnerability allows an attacker to trigger excessive memory allocation, potentially leading to denial-of-service (DoS) attacks or system instability. The vulnerability was introduced in version v5.3 of the Linux Kernel and has been fixed in version v5.10.121.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Linux Kernel to the fixed version to mitigate the risk.
Conclusion
The excessive memory allocation vulnerability in the bpf package can be mitigated by updating the Linux Kernel to version v5.10.121 or later. It is essential to apply this update to prevent potential denial-of-service attacks or system instability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can be exploited to trigger excessive memory allocation, potentially leading to denial-of-service (DoS) attacks or system instability.
You can use Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you if the vulnerability is present.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to update the Linux Kernel to the fixed version to prevent potential exploitation.
No, updating the Linux Kernel to the fixed version is the recommended approach to mitigate this vulnerability. There are no known workarounds available.
You can find more information about this vulnerability in the Open Source Vulnerability Database (OSVDB) entry with ID GSD-2022-1003654.
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