Kernel Null Pointer Dereference in Linux Kernel Affects Networking Functionality

CVE-2026-64545

What is CVE-2026-64545?

A vulnerability exists in the Linux kernel's handling of network devices that can lead to a null pointer dereference due to improper checks in the xdp_master_redirect() function. When the network device lacks an upper master, the function attempts to dereference a NULL pointer, triggering a kernel panic and halting the system. This issue stems from legacy code that did not adequately safeguard against NULL master pointers, potentially leaving the system vulnerable to crashes during network operations.

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