Critical. A vulnerability whose exploitation could allow code execution without user interaction. These scenarios include self-propagating malware (e.g. network worms), or unavoidable common use scenarios where code execution occurs without warnings or prompts. This could mean browsing to a web page or opening email.
A strain is a stretching or tearing of muscle or tendon. A tendon is a fibrous cord of tissue that connects muscles to bones. Strains often occur in the lower back and in the hamstring muscle in the back of your thigh. Initial treatment for both sprains and strains includes rest, ice, compression and elevation.
Definition. 1  A muscle strain is an injury (partial tear) that damages the internal structure of the muscle. The tearing may be so small that one could only see it with a microscope or the tearing may be severe enough to cause internal bleeding and cause some muscle fibers to lengthen.