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Renfei Zhang

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#artificial intelligence Preprint Aug 2026

Reinforcement Learning on Benign Facts Amplifies Leakage of Memorized Private Data

Reinforcement learning with verifiable rewards (RLVR) is deployed to make models better at reasoning tasks, but its side effect on what models will divulge is under studied. Here we show that RLVR on facts increases extraction of personally identifiable information (PII) the instruct model had already memorized. We fir...

Renfei Zhang, Niloofar Mireshghallah · 1 citation