CVE-2023-53254

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> cacheinfo: Fix shared_cpu_map to handle shared caches at different levels<br /> <br /> The cacheinfo sets up the shared_cpu_map by checking whether the caches<br /> with the same index are shared between CPUs. However, this will trigger<br /> slab-out-of-bounds access if the CPUs do not have the same cache hierarchy.<br /> Another problem is the mismatched shared_cpu_map when the shared cache does<br /> not have the same index between CPUs.<br /> <br /> CPU0 I D L3<br /> index 0 1 2 x<br /> ^ ^ ^ ^<br /> index 0 1 2 3<br /> CPU1 I D L2 L3<br /> <br /> This patch checks each cache is shared with all caches on other CPUs.