B.27.4. RHBA-2011:0321 — glibc bug fix update

Updated glibc packages that fix a bug in the dynamic linker are now available for Red Hat Enterprise Linux 6.
The glibc packages contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.
Bug Fix
Due to an error in glibc libraries, a race condition could occur when traversing a list of currently loaded shared libraries, causing an application to terminate with an error. This error has been fixed, the race condition no longer occurs, and the list of shared libraries can now be traversed as expected.
All users are advised to upgrade to these updated packages, which resolve this issue.