Comment 5 for bug 393736

This bug is already Fix Released, since it has been applied to Ubuntu Karmic. There is no need to update the importance of a closed bug.

The security issue you mention, CVE-2009-1889, is still "under review", and the page you linked lists it as "not critical". Once it is officially on the CVE list you may wish to report this as a new security bug, in order for SRUs to be issued.