CVE-2014-5148

CVE-2014-5148 describes a denial-of-service vulnerability in Xen 4.4.x on ARM systems. When handling unknown system register access from 64-bit userspace, Xen incorrectly returns to a kernel space fault handler, allowing local guest users to crash the system and potentially gain privileges. With a CVSS score of 4.6 (AV:L/AC:L/Au:N/C:P/I:P/A:P), this vulnerability requires local access and has low attack complexity, leading to potential partial confidentiality, integrity, and availability impacts. There is no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.