CVE-2012-5517

CVE-2012-5517 is a denial-of-service vulnerability in the Linux kernel (before version 3.6) that allows local users to crash the system. This flaw, located in the online_pages function within mm/memory_hotplug.c, can be triggered by exploiting memory hot-added by an administrator, leading to a NULL pointer dereference. With a CVSS score of 4.0, it is considered a low-severity vulnerability, requiring local access and high attack complexity to achieve a complete denial of service. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.