CRS Bundle Patch I was released for version 188.8.131.52.
It is available for Linux x86 and x86-64, AIX 64-bit, HP-UX Itanium and HP-UX RISC 64-bit.
Details can be found on metalink Note 810663.1 11.1.0.X CRS Bundle Patch Information
Before applying the patch be sure to follow instructions on Note 458485.1 : "How to find whether the one-off Patches will conflict or not?", to check for potential conflicts between patches already applied and the new patches.
Apply on test, check and then go on production.