netlink validation

The netlink validation tag covers discussions about input validation in the Linux kernel's netlink subsystem, particularly how missing or insufficient checks on netlink attributes can lead to security vulnerabilities and system instability. A recent example is CVE-2026-31420, where a zero test interval in the bridge MRP path caused a kernel panic due to memory exhaustion. The fix involved adding a minimum value policy at the attribute-parsing layer to reject invalid inputs early. This tag highlights the importance of rigorous validation in netlink message handling to prevent similar issues.