Remote Partition Vulnerability in Linux Kernel

CVE-2025-71142

What is CVE-2025-71142?

A vulnerability has been identified in the Linux Kernel related to cpuset functionality, specifically concerning the disabling of remote partitions. When the remote partition is disabled, a warning is generated if the effective CPUs assigned to the partition do not match the valid CPUs available for use, leading to shared access issues. This occurs under certain CPU configurations, where subpartitions may not have any CPUs allocated. To mitigate this issue, the kernel now ensures that warnings are suppressed when the subpartitions contain no CPUs, thereby informing users of invalid partitions during the CPU hotplug process. These adjustments are crucial for maintaining kernel integrity and ensuring system stability.

References