CVE-2006-5173

CVE-2006-5173 describes a denial-of-service vulnerability in the Linux kernel, affecting various distributions including Canonical Ubuntu and generic Linux kernels. The flaw stems from improper handling of the EFLAGS register during context switches and thread creation, specifically the Alignment Check flag. A local attacker can exploit this to crash other processes via unaligned memory access, resulting in a low-severity denial of service (CVSS 2.1). There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.