RHBA-2012:0827 - Bug Fix Advisory

Topic

Updated microcode_ctl packages that fix one bug and add two enhancements are now
available for Red Hat Enterprise Linux 6.

Description

The microcode_ctl packages provide microcode updates for Intel and AMD
processors.

This update fixes the following bug:

• Previously, running the microcode_ctl utility with long arguments for the "-d"

or "-f" options led to a buffer overflow. Consequently, microcode_ctl terminated
unexpectedly with a segmentation fault and a backtrace was displayed. With this
update, microcode_ctl has been modified to handle this situation gracefully. The
microcode_ctl utility no longer crashes and displays an error message informing
the user that the file name used is too long. (BZ#768803)

In addition, this update adds the following enhancements:

• The Intel CPU microcode file has been updated to version 20111110, which is

the latest version of the microcode available from Intel. (BZ#736266)

• The AMD CPU microcode file has been updated to version 20120117, which is the

latest version of the microcode available from AMD. (BZ#787757)

All users of microcode_ctl are advised to upgrade to these updated packages,
which fix this bug and add these enhancements.

Solution

Before applying this update, make sure that all previously-released errata
relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red Hat
Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386

Fixes

CVEs

(none)

References

(none)