Linux Kernel Memory Leak in SMB Client

Executive Summary

This vulnerability in the Linux kernel involves uninitialized stack memory in the SMB client component. Specifically, a structure called cifs_open_info_data is allocated on the stack without being zeroed out first. This means it may contain random residual data from previous operations, which could lead to incorrect values in some fields if they are not explicitly set later.

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Detection Guidance

This vulnerability involves uninitialized stack memory in the Linux kernel's SMB client. Detection requires checking kernel versions and SMB client usage. Inspect kernel logs for SMB-related errors or crashes. Use commands like 'dmesg | grep cifs' or 'journalctl -k | grep cifs' to identify issues. Ensure your kernel is updated to a patched version.

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Impact Analysis

The impact depends on how the affected code is used. If the uninitialized fields in cifs_open_info_data are used before being properly set, it could result in incorrect behavior during SMB file operations. This might cause errors, crashes, or unexpected data handling in applications relying on the Linux kernel's SMB client functionality.

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Compliance Impact

The vulnerability involves uninitialized stack memory in the Linux kernel's SMB client, which could lead to incorrect values in certain fields. This may cause data corruption or unintended behavior during file operations. However, the provided context does not specify direct impacts on compliance with standards like GDPR or HIPAA.

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Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for this issue. Reboot your system after applying the update to ensure the patched kernel is active. Monitor system logs for any SMB client-related errors post-update.

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