Module Load Failure in Linux Kernel Leads to Memory Leak

Executive Summary

This vulnerability in the Linux kernel involves an error handling flaw in the module loading process. When codetag_load_module() fails, the error code is not properly set, causing load_module() to incorrectly return success (0) even after the module is torn down. Additionally, memory allocated for livepatch information leaks in this error path.

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Detection Guidance

This vulnerability is specific to the Linux kernel and relates to module loading errors. Detection requires checking kernel logs for module loading failures or memory leaks related to livepatch modules. Use commands like dmesg | grep -i module or journalctl -k | grep -i module to review kernel logs for errors.

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Impact Analysis

This vulnerability could lead to system instability or crashes if a module fails to load properly but the system believes it loaded successfully. It may also cause memory leaks, reducing system performance over time. For livepatch modules, it could result in incomplete or incorrect patching of the kernel.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It is a Linux kernel module error handling issue that could lead to resource leaks or incorrect module loading states, but it does not involve data breaches, unauthorized access, or privacy violations typically addressed by these regulations.

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Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the module loading error and memory leak in codetag_load_module().

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