Kernel brk() security announcement

I just got the email from SuSE about the Kernel brk() vulnerability. Going through the instructions in the email I see that kernel k_athlon-2.4.21-144.i586.rpm is what I'm supposed to download. About a week ago there was a kernel update that I did with YaST/YOU. It is the same version number as the one listed for the current security announcement. ~>rpm -q k_athlon k_athlon-2.4.21-144 I'm I correct to assume that I'm OK? Is it possible that changes were made to the kernel but the version number didn't change? Cheers, Gary