szerintem erre gondolt: http://www.mail-archive.com/debian-glibc@lists.debian.org/msg21746.html
te meg erre(?): http://www.debian.org/doc/manuals/securing-debian-howto/ch4.en.html#s4.9
Newer versions of the kernel do however handle the noexec flag properly:
angrist:/tmp# mount | grep /tmp
/dev/hda3 on /tmp type ext3 (rw,noexec,nosuid,nodev)
angrist:/tmp# ./date
bash: ./tmp: Permission denied
angrist:/tmp# /lib/ld-linux.so.2 ./date
./date: error while loading shared libraries: ./date: failed to map segment
from shared object: Operation not permitted