Unspecified vulnerability in IBM Java Runtime Environment (JRE) 7 R1 before SR2 (7.1.2.0), 7 before SR8 (7.0.8.0), 6 R1 before SR8 FP2 (6.1.8.2), 6 before SR16 FP2 (6.0.16.2), and before SR16 FP8 (5.0.16.8) allows local users to execute arbitrary code via vectors related to the shared classes cache.