CVE-2011-4621

CVE-2011-4621 describes a denial-of-service vulnerability in the Linux kernel versions prior to 2.6.37. This flaw stems from an improper clock-update optimization, allowing a local attacker to trigger a system hang by executing a looping application. Rated as Medium severity (CVSS 5.5), exploitation requires local access with low attack complexity, leading to high availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.