NULL Pointer Dereference Vulnerability in Linux Kernel Affects AMD RAS

CVE-2026-53315

What is CVE-2026-53315?

A vulnerability in the Linux kernel allows for a potential NULL pointer dereference in the AMD RAS module. Specifically, the function ras_core_get_utc_second_timestamp() checks the validity of the ras_core before executing a callback to retrieve the current UTC timestamp. If the ras_core pointer is NULL, an attempt to access ras_core->dev results in an unsafe dereference. By implementing an early NULL check for ras_core, the function can safely return 0 when the pointer is invalid, thus enhancing the robustness of the control flow and preventing possible system crashes.

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