Memory Initialization Flaw in Linux Kernel's Transport Packet Handling

CVE-2025-38403

What is CVE-2025-38403?

A significant security concern has been identified in the Linux kernel related to the handling of vmci transport packets. The vulnerability arises from the improper initialization of the transport packet structure, which can leave residual uninitialized data. This oversight can potentially expose sensitive information to unauthorized users, highlighting the importance of clear memory operations before data assignment. To mitigate this issue, the initialization function now employs memset to zero out the transport packet, ensuring that all fields are properly populated and devoid of residual data.

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