Serving openly in military: Ambiguous from Sep 14, 1948 to now.
Some secondary sources claim it is a "Don't Ask Don't Tell" situation. But, based on a North Korean propaganda film from the year 2000, male homosexuality may be against the law in the military, including for prisoners of war. Information is extremely limited, because North Korea heavily censors LGBT content.
Sources: Myers, B. R. The Cleanest Race: How North Koreans See Themselves and Why It Matters. Melville House, 2011.
Ultimately sourced from North Korean propaganda film, "Snowstorm in Pyongyang" (2000).
Hassig and Oh (2009) The Hidden People of North Korea
Martin (2006) Under the Loving Care of the Fatherly Leader, p. 521