Description of problem:
from Gentoo bugzilla:
https://bugs.gentoo.org/show_bug.cgi?id=209460

Version-Release number of selected component (if applicable):
at least 2.6.18-53.1.4.el5 and 2.6.18-53.1.6.el5

How reproducible:
always

Steps to Reproduce:
1. get the sourcecode for the proof-of-concept exploit
2. compile with gcc <source.c>
3. run the program
  
Actual results:
Granted a root shell

Expected results:
Should not grant root shell

Additional info:

enabling pam_wheel from /etc/pam.d/su prevents users not in wheel (or defined)
group getting root shell but instead may cause kernel panic