This morning my imap server dovecot stopped working. The only thing that changed was krb5/keyutils updates. Here is the error message from /var/log/maillog Nov 21 10:32:11 hopf dovecot: imap-login: imap-login: error while loading shared libraries: libsepol.so.1: failed to map segment from shared object: Cannot allocate memory Nov 21 10:32:11 hopf dovecot: child 3550 (login) returned error 127 Nov 21 10:32:11 hopf dovecot: child 3551 (login) returned error 127 This is an X86_64 system. The only dovecot installed is dovecot-1.0-1.2.rc15.el5.x86_64 Here is the output of "yum list libsepol*" Installed Packages libsepol.x86_64 1.15.2-1.el5 installed libsepol.i386 1.15.2-1.el5 installed libsepol-devel.x86_64 1.15.2-1.el5 installed Here are the things that changed last night (from yum.log) Nov 21 05:47:59 Installed: keyutils-libs.i386 1.2-1.el5 Nov 21 05:48:02 Updated: krb5-libs.i386 1.6.1-17.el5 Nov 21 05:48:03 Installed: keyutils-libs.x86_64 1.2-1.el5 Nov 21 05:48:04 Updated: krb5-libs.x86_64 1.6.1-17.el5 Nov 21 05:48:05 Installed: keyutils-libs-devel.x86_64 1.2-1.el5 Nov 21 05:48:07 Updated: krb5-devel.i386 1.6.1-17.el5 Nov 21 05:48:09 Updated: krb5-devel.x86_64 1.6.1-17.el5 Nov 21 05:48:13 Updated: krb5-workstation.x86_64 1.6.1-17.el5