CVE-2026-53315

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()<br /> <br /> ras_core_get_utc_second_timestamp() retrieves the current UTC timestamp<br /> (in seconds since the Unix epoch) through a platform-specific RAS system<br /> callback and is used for timestamping RAS error events.<br /> <br /> The function checks ras_core in the conditional statement before calling<br /> the sys_fn callback. However, when the condition fails, the function<br /> prints an error message using ras_core-&gt;dev.<br /> <br /> If ras_core is NULL, this can lead to a potential NULL pointer<br /> dereference when accessing ras_core-&gt;dev.<br /> <br /> Add an early NULL check for ras_core at the beginning of the function<br /> and return 0 when the pointer is not valid. This prevents the<br /> dereference and makes the control flow clearer.