CVE-2026-64180

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mm/memory_hotplug: fix memory block reference leak on remove<br /> <br /> Patch series "mm: Fix memory block leaks and locking", v2.<br /> <br /> This series fixes two memory block device reference leaks and one locking<br /> issue around the per-memory_block hwpoison counter.<br /> <br /> <br /> This patch (of 2):<br /> <br /> remove_memory_blocks_and_altmaps() looks up each memory block with<br /> find_memory_block(), which acquires a reference to the memory block<br /> device.<br /> <br /> That reference is never dropped on this path, resulting in a leaked device<br /> reference when removing memory blocks and their altmaps. Drop the<br /> reference after retrieving mem-&gt;altmap and clearing mem-&gt;altmap, before<br /> removing the memory block device.