Can someone be a "twice awarded Combat Infantry Badge recipient" from different wars (Korea & VN)?

Yes and some may have even caught the end of WW II and served in that as well as Korea and Vietnam like my father did. He caught the end of WW II while in the Navy and was among those for the planned invasion force of Japan when the war ended. Discharged at the end of the war he was a civilian for a few years before going back into the Marine Corps since they were taking people then while the Nave wasn't. He went on to serve another 26 years almost in the Corps before he retired in 1968 and did tours first in Korea and then later in Vietnam for which he received various campaign medals and awards for.

Yes you can be awarded multiple CIB's for separate wars ie; Vietnam, Desert Storm, Somalia, Iraq,

simple answer is yes. Very common in the Vietnam era for CIB wit star for Korea and Vietnam and I have been a few with two stars for WWII, Korea and Vietnam. Same is true today. Department of the Army sets the rules for what constitutes different wars Multiple tours in the same conflict do not count that is what campaign medals are for with battle stars.. Much respect for anyone that traded direct fire with the enemy in two or more different conflicts.

Those that have proven certification of been actively exposed to combat (overtly/covertly) like the conflict in El Salvador and Grenada should be recognized by their actions/exposure. Those who only were present or administratively assigned should not. The CIB is a unique award and only presented to those that truly deserved.

According to the Army's website (army.mil) the National Infantry Museum has an exhibit listing the names of all 325 individuals who have officially been awarded a 3rd Combat Infantry Badge, so it's incredibly rare and should you encounter anyone claiming to have one and aren't rather elderly you should safely assume that they're not legit:

https://www-army-mil.cdn.ampproject.org/v/s/http://www.army.mil/article-amp/90516/cib_exhibit_unveiled_at_museum?amp_js_v=a2&amp_gsa=1&usqp=mq331AQCCAE%3D#referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fwww.army.mil%2Farticle%2F90516%2Fcib_exhibit_unveiled_at_museum

Yes, Second award is a single STAR, third is two stars.

My Dad was twice CIB for WWII and Korea. I have his first one. He was hit in Korea and separated in CONUS so he never wore the second award.

I met one of the few who had three CIB awards (patch was sewn onto his jungle fatigues) when I arrived at Long Binh in may '69. The gentleman was a SSG, infantry, and appeared to be old enough (mid to late 40s) to be my father. he said he had been in WWI, the Korean war, and was on his third tour in Vietnam. I wished him well and I hope he made it through.

YES

Had an uncle, CSM, United States Army, got it twice..Korea and Vietnam..may he rest in peace...