Living Dead Lock Up (2005)

A deep buried secret threatens the inhabitants of Stone Gate Penitentiary. When a petty car thief is sentenced to the prison, he encounters more than he expected. A bizarre occurrence unleashes a hoard of possessed Zombies out into the institute. Now he and his cell mate Miguel must find a way to break out of prison and rescue his girlfriend before they become one of the living dead.

Unfortunately the movie Living Dead Lock Up is not yet available on HBO Max.