Yup. She, James-006, and John-117 went to enact the Cole Protocol on board Gamma Station. On the way there, James was rendered MIA. After completing the mission, Linda was hit in the back with an overcharged plasma pistol, causing her vitals to flatline. Hoping that she could be revived at a later time, John froze her in cryo sleep. When the Pillar of Autumn went to crash land on Halo, all remaining cryopods were jettisoned for later retrieval. An automatic precaution. When Chief and Cortana destroyed Halo, they later found Linda's cryopod among the massive debris field. Eventually, they would extract Dr. Halsey, and with her help, Linda was able to be revived.