CVE-2024-45010 is a medium-severity vulnerability in the Linux kernel's Multipath TCP (mptcp) path manager. It involves incorrect decrementing of the local_addr_used counter when removing 'signal' endpoints, which should only be decremented for 'subflow' endpoints. This flaw was identified through selftests and fixed by ensuring the counter is decremented only for valid 'subflow' endpoints and under correct conditions.