CVE-2014-8173

CVE-2014-8173 is a denial-of-service vulnerability affecting the Linux kernel before version 3.13 on NUMA systems. It stems from a flaw in the pmd_none_or_trans_huge_or_clear_bad function, which incorrectly handles Page Middle Directory entries, allowing local users to trigger a NULL pointer dereference and system crash via a crafted MADV_WILLNEED madvise system call. With a CVSS score of 7.2, this vulnerability is considered high severity, requiring local access with low attack complexity, and potentially leading to a complete system compromise (C:C/I:C/A:C). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.