CVE-2006-6304 affect kernel on RHEL5?

Issue

• According to the CVE info, these are kernel 2.6.19 issue, so it looks that these does not affect RHEL5. However, the relevant code looks to be included in RHEL5.
• This issue's patch info is written at http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg102611.html

*******************************************************
  --- linux-2.6.19.orig/fs/exec.c
  +++ linux-2.6.19/fs/exec.c
  @@ -1515,7 +1515,8 @@ int do_coredump(long signr, int exit_cod
                  ispipe = 1;
          } else
                  file = filp_open(corename,
  -                                O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE, 0600);
  +                                O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE | flag,
  +                                0600);
          if (IS_ERR(file))
                  goto fail_unlock;
          inode = file->f_dentry->d_inode
*******************************************************

You can see "flag" option is added in filp_open().

I compared kernel-2.6.19.1 to kernel-2.6.18-128(RHEL5), but kernel-2.6.18 is 
not patched.

/linux-2.6.19.1/fs/exec.c
***************
int do_coredump(long signr, int exit_code, struct pt_regs * regs)
  :
  :

         } else
                 file = filp_open(corename,
 !                                O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE | flag, 
 !                                0600);                                   
***************

/linux-2.6.18-128/fs/exec.c
---------------
int do_coredump(long signr, int exit_code, struct pt_regs * regs)
  :
  :

                 }
         } else
                 file = filp_open(corename,
 !                                O_CREAT | 2 | O_NOFOLLOW | O_LARGEFILE, 0600);
 !
---------------