Keeping an Eye on LLM Unlearning: The Hidden Risk and Remedy - Ren, Jie; Dai, Zhenwei; Tang, Xianfeng; XING, Yue; Zeng, Shenglai; Zeng, Jingying; Peng, Qiankun; Varshney, Samarth; Wang, Suhang; He, Qi; Aggarwal, Charu; Liu, Hui (Advances in Neural Information Processing Systems, 2025)