Buffer Corruption in Netfilter Component of Linux Kernel

CVE-2026-64006

What is CVE-2026-64006?

A vulnerability was identified in the Linux kernel's netfilter component, affecting the handling of the shift operations in certain scenarios. Specifically, the issue arises when the source and destination memory locations overlap during left and right shift operations. This could lead to incorrect calculations for carry values, potentially compromising the integrity of packet processing. A temporary variable was introduced to cache the original source value before modifications, ensuring that carry calculations remain accurate. The vulnerability highlights the importance of ensuring memory boundaries are respected in operations to prevent unexpected behavior.

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