An updated microcode_ctl package that fixes a bug and adds various enhancements is now available for Red Hat Enterprise Linux 6.
The microcode_ctl package provides microcode updates for Intel and AMD processors.
A previous update introduced a memory leak when loading the updated microcode into memory prior to conversion of said microcode into a format suitable for the CPU. This update includes a corrected patch that de-allocates the memory correctly, ensuring memory does not leak.
The Intel CPU microcode file has been updated to version 20110915, which is the most recent version of the microcode available from Intel.
The AMD CPU microcode file version 20110111 is now included in the package.
Note that the system must be rebooted in order for these changes to take effect.
Users are advised to upgrade to this updated microcode_ctl package, which fixes this bug and adds these enhancements.